Fred A.
Baughman Jr. comments on (10/10/02): [Fred A. Baughman Jr., MD:long a member of
the national professional advisory board of CHADD, created by Ciba/Novartis for
Ciba/Novartis, which has professed throughout it's existence, that ADHD is a
"neurobiological disorder," a disease; that children with it are brain-abnormal,
brain-diseased] ; Patti P. Lee, MD; Wendy Sharp, MSW; Neal O. Jeffries,
PhD; Deanna K. Greenstein, PhD; Liv S. Clasen, PhD; Jonathan D. Blumenthal, MA;
Regina S. James, MD; Christen L. Ebens, BA; James M. Walter, MA; Alex Zijdenbos,
PhD; Alan C. Evans, PhD; Jay N. Giedd, MD; Judith L. Rapoport, MD
Developmental
Trajectories of Brain Volume Abnormalities in Children and Adolescents With
Attention-
Deficit/Hyperactivity
Disorder
F. Xavier Castellanos, MD
Context Various anatomic brain
abnormalities have been reported for attention-deficit/hyperactivity disorder
(ADHD), with varying methods, small samples, cross-sectional designs, and
without accounting for stimulant drug exposure.
Objective To compare regional
brain volumes at initial scan and their change over time in medicated and
previously unmedicated male and female patients with ADHD and healthy controls.
[Fred A. Baughman Jr., MD:Their objective, quite simply, should be to determine whether or
not ADHD is a bona fide, diagnosable, disease having, as it must, a confirming
macroscopic (gross), microscopic or chemical abnormality, demonstrable in life
or at death (autopsy)]
Design,
Setting, and Participants Case-control study
conducted from 1991-2001 [Fred A. Baughman Jr., MD:Swanson and Castellanos made no mention
that such a study was underway in their November 16-18, 1998 presentation at the
NIH Consensus Conference on ADHD in which they presented "a meta-analysis of
studies from several independent laboratories that have reported ADHD/HKD
abnormalities in two specific but still coarsely defined brain regions of the
frontal lobes and basal ganglia" failing, as they did so to acknowledge that the
ADHD subjects in all of these studies had been on long-term stimulant
treatment-the only known physical variable. When questioned by myself, from the
audience, Swanson presenting for he and Castellanos, acknowledged the need for
brain scan studies of non-drug-exposed ADHD subjects, and also the fact that no
such study had been undertaken to that date. Nor did he mention that any had been
planned. And yet here we have a
"Case-control study conducted from 1991-2001.] .....at the National
Institute of Mental Health, Bethesda, Md, of 152 children and adolescents with
ADHD (age range, 5-18 years) and 139 age- and sex-matched controls (age range,
4.5-19 years) recruited from the local community, who contributed 544 anatomic
magnetic resonance images.
Main
Outcome Measures Using completely
automated methods, initial volumes and prospective age-related changes of total
cerebrum, cerebellum, gray and white matter for the 4 major lobes, and caudate
nucleus of the brain were compared in patients and controls. [Fred A. Baughman Jr., MD:true
scientists seeking to determine the presence or absence of abnormality, would be
prepared to find any abnormality.
These "scientists" seemed convinced that their would be volume changes
"of total cerebrum, cerebellum, gray and white matter for the 4 major lobes, and
caudate nucleus of the brain."]
Results On initial scan, patients with ADHD had significantly smaller brain volumes in all regions, even after adjustment for significant covariates. This global difference was reflected in smaller total cerebral volumes (-3.2%, adjusted F1,280 = 8.30, P = .004) and in significantly smaller cerebellar volumes (-3.5%, adjusted F1,280 = 12.29, P = .001). Compared with controls, previously unmedicated children with ADHD demonstrated significantly smaller total cerebral volumes (overall F2,288 = 6.65; all pairwise comparisons Bonferroni corrected, -5.8%; P = .002) and cerebellar volumes (-6.2%, F2,288 = 8.97, P<.001). Unmedicated children with ADHD also exhibited strikingly smaller total white matter volumes (F2,288 = 11.65) compared with controls (-10.7%, P<.001) and with medicated children with ADHD (-8.9%, P<.001). Volumetric abnormalities persisted with age in total and regional cerebral measures (P = .002) and in the cerebellum (P = .003). Caudate nucleus volumes were initially abnormal for patients with ADHD (P = .05), but diagnostic differences disappeared as caudate volumes decreased for patients and controls during adolescence. Results were comparable for male and female patients on all measures. Frontal and temporal gray matter, caudate, and cerebellar volumes correlated significantly with parent- and clinician-rated severity measures within the ADHD sample (Pearson coefficients between -0.16 and -0.26; all P values were <.05).
Conclusions Developmental trajectories for all structures, except caudate, remain roughly parallel for patients and controls during childhood and adolescence, suggesting that genetic and/or early environmental influences on brain development in ADHD are fixed, nonprogressive, and unrelated to stimulant treatment.
JAMA.
2002;288:1740-1748
[Fred A. Baughman Jr., MD: On to the study itself]
[Fred A. Baughman Jr., MD:important,
because not a single psychiatry entry in any volume of the DSM has been proved
to be an organic disease having, as it must, an objective physical abnormality
by which to confirm it's presence in one or more patients] , is thought
to reflect subtle abnormalities in central nervous system
functioning. [Fred A. Baughman Jr., MD:thought
by psychiatry, but no other branch of medicine. Carey, a pediatrician, and an authority
on temperament testified at the Consensus Conference: What is now most often
described as ADHD in the United
States appears to be a set of normal behavioral variations that sometimes lead
to dysfunction through dissonant environmental interactions. This discrepancy leaves the validity of
the construct in doubt." Carey,
suspecting it is not a disease at all would not begin the application of
biomedical technologies] .For this reason, ADHD is being studied
increasingly with a variety of brain imaging techniques throughout the life
span. Magnetic resonance imaging (MRI) is particularly suitable for the study of
pediatric patients, providing high-resolution images without ionizing radiation.
Previous MRI neuroimaging studies, most with small samples [Fred A. Baughman Jr., MD:and all
using subjects, virtually all of
whom have been on Schedule II amphetamines and amphetamine-like medications-the
only known physical variable] , have reported smaller anatomic areas
and/or volumes in patients with ADHD in regions of the corpus
callosum,
Attention-deficit/hyperactivity
disorder (ADHD), the most common childhood psychiatric disorder
[Fred A. Baughman Jr., MD:The
totality of the CT and MRI brain scanning literature reviewed by Swanson and
Castellanos at the 1998 CC, encompassing the 12 years, 1986-1998 was performed
on MBD/ADD/ADHD subjects, virtually all of whom were on stimulants-the only
known physical variable-and found atrophy or shrinkage of the brain and parts of
the brain. Swanson and Castellanos
did not mention the presence of drugs in their presentation at the CC until I
called Swanson on the point. This
12 years of literature stands as proof-replicated time after time, that the
long-term use/prescription of these medications causes brain atrophy. There has never yet been validation of
ADHD as a disease. Such was clearly
the status of ADHD as of the CC, November, 1998 by which time the ADHD epidemic
was approximately 4 million in the US.
Furthermore, as each of these studies was published they were invariably
represented to be confirmation of ADHD, the "disease", with mention of the
drug-exposure status of the subjects, buried in the small print of "methods"
within the original article, and otherwise, forever
lost.]
Although we previously conducted anatomic studies in male (n = 112)20 and female (n = 100)16 patients with ADHD and controls, we were unable to rigorously contrast or combine the 2 sets of findings because the original measurement techniques used were no longer available. Moreover, we have continued to recruit new patients, including a sizable number of patients who had never been previously exposed to psychotropic medications.
The present study was designed to examine brain anatomy using the same automated measures from cross-sectional scans of a large sample of male and female patients with ADHD, determine the effect of prior stimulant drug exposure on anatomic abnormalities in ADHD, and examine brain regional longitudinal growth trajectories in patients and controls.
We
hypothesized that patients with ADHD would have smaller brain regional volumes,
particularly in caudate nucleus,8,
13
cerebellum,16-18 and frontal
lobe8,
9; previously
unmedicated children and adolescents with ADHD would demonstrate similar brain
abnormalities as medicated patients16; and caudate anatomic
abnormalities would diminish with age. Examination of age-related changes in
other brain regions was exploratory.
[Fred A. Baughman Jr., MD:It
seemed to me viewing the brain scanning literature, 1986 through the present,
that they knew the subjects (most on Schedule II stimulants) would have brain
atrophy and that they anticipated representing this, not as drug-induced, but as
"proof" that ADHD is a disease, that the atrophy is it's confirming, objective
abnormality. In their current study
this is what they pretend to refute while "proving" once again that ADHD is a
disease with the brain atrophy its confirming abnormality. As you shall see they do not wash away
the 12 years of proof after proof that the stimulant drugs cause brain atrophy
and they do not prove, in it's place that brain atrophy is the demonstrable,
diagnostic abnormality making ADHD an unquestioned disease]
METHODS [Fred A. Baughman Jr., MD:If brain scanning of
this patient population began in 1991, and DSM IV was not published
until 1994, the 1991-1993 subjects could not have been defined according to DSM
IV criteria. DSM III? DSM IIIR? In a 1995 review of the
neuro-imaging literature on ADHD, Ernst [28] commented: "The definition of ADHD
has changed over time.This change
has contributed to the selection of research samples with differing clinical
characteristics, making comparisons among studies difficult...samples of children
with ADHD who were diagnosed according to DSM-III-R (1987) criteria include
children who do not meet DSM-III (1980) criteria."
What Ernst pointed out is that the ADD of DSM-III
(1980), the ADHD of DSM-III-R (1987), and the ADHD of DSM-IV (1994) are 3
separate, incomparable entities.
The 1980, DSM III, ADD was never confirmed as an organic disease before
it was jettisoned in favor of the 1987, DSM IIIR version of ADHD, and that, in
turn was never confirmed as a disease before it was jettisoned in favor of the
DSM IV version of ADHD...all of this in- committee at the American Psychiatric
Association, long ago bought and paid for by Big Pharma.
Is this science?
Are these scientists?
Do we owe it to them to consider what
they write here as science?
Should non-compromised
scientists be allowed "in" to inspect?
]
Patients
A total of 89 male
(mean initial age, 10.5 years; range, 5.1-18.4) and 63 female (mean initial age,
9.4; range, 5.3-16.0) children and adolescents with Diagnostic and
Statistical Manual of Mental Disorders, Fourth Edition
(DSM-IV21)-defined
ADHD were recruited from the surrounding community.
Inclusion criteria
were: hyperactive, inattentive, and impulsive behaviors that were impairing in
at least 2 settings and a Conners' Teacher Hyperactivity rating greater than 2
SD above age- and sex-specific means.22,
23 The
DSM-IV diagnosis of ADHD was
based on the Parent Diagnostic Interview for Children and
Adolescents,24 Conners' Teacher
Rating Scales,22,
23 and the Teacher
Report Form.25 A clinical
psychologist administered the Wechsler Intelligence Scale for
Children-Revised26 to 110 patients with
ADHD and the Wechsler Intelligence Scale for Children-III27 to 41 patients (1 was
too young to be tested). Exclusion criteria were a full-scale IQ of less than
80, evidence of medical or neurological disorders on examination or by clinical
history, Tourette disorder, or any other axis I psychiatric disorder requiring
treatment with medication at study entry. [Fred A. Baughman Jr., MD:No matter the
multiplicity of measures, not one is an objective, physical measure; no one or
several positive results on such wholly subjective tests or scales equates to,
suggests, or implies, organic disease of the brain. Recall that "biological" psychiatry has
yet to offer us their first biological proof.]
A total of 56
unrelated healthy female (mean initial age, 10.0 years; range, 5.2-16.1) and 83
male (mean initial age, 10.9; range, 4.5-19.0) controls were recruited from the
community via the National Institutes of Health Normal Volunteer Office and
outreach to local schools. Screening included an initial telephone interview,
parent and teacher rating scales,25 in-person assessment
including physical and neurological examinations including
handedness,28 and clinical history
obtained by a child and adolescent psychiatrist (J.N.G.) [Fred A. Baughman Jr., MD:Parent and
teacher rating scales they would have us believe are tools with which to
validate the presence of organic disease of the brain. Neurological examinations were done and
apparently ruled out all objective neurological abnormalities; things such as
abnormal gait, paralysis of one side or the other, visual field defects, facial
palsy, objective physical abnormalities, as compared to the so-called invisible
disabilities of special education and of psychiatry, generally] .
Vocabulary and block design subtests from the Wechsler Intelligence Scale for
Children-Revised (n = 80), Wechsler Intelligence Scale for Children-III (n =
23), Wechsler Abbreviated Scale of Intelligence
This study
was conducted at the Child Psychiatry Branch of the National Institute of Mental
Health in Bethesda, Md, between 1991 and 2001. The institutional review board
approved the research protocol, and written informed consent and assent to
participate in a study of brain development were obtained from parents and
children, respectively, at study entry and at each subsequent MRI examination.
[Fred A. Baughman Jr., MD:It would be informative to obtain and review their informed consent
documents] Healthy volunteers and patients not currently
participating in treatment studies were paid to participate.
Behavioral
Measures [Fred A. Baughman Jr., MD:Nothing less than a life-history of
medication usage can suffice in a study such as this]
Primary symptom
severity measures were those that remained constant across the study decade
using the Attention Problems Factors from the Child Behavior Checklist and
Teacher Report Form25 and the Clinical
Global Impressions scale for Severity of Illness.33 Medication status was
obtained from parental history.
MRI
Acquisition
All patients and
controls were studied on the same 1.5-T General Electric Signa scanner
(Milwaukee, Wis). T1-weighted images with contiguous 1.5-mm slices in the axial
plane and 2.0-mm slices in the coronal plane were obtained using 3-dimensional
spoiled gradient recalled echo in the steady state. Imaging parameters were echo
time of 5 ms, repetition time of 24 ms, flip angle of 45°, acquisition matrix of
256 <<...OLE_Obj...>> 192, number of excitations equals 1,
and 24 cm field of view. Head placement was standardized as previously
described.16
Image
Analysis
T2-weighted images
were obtained for evaluation by a clinical neuroradiologist. All raters were
blind to demographic characteristics. Quantification of MRI images was performed
via a 3-part fully automated image analysis process that determines the volumes
of gray and white matter compartments in frontal, temporal, parietal, and
occipital lobes as well as basal ganglia and cerebellum with excellent
test-retest reliability as described elsewhere in detail.34-36
Visual
inspection of each scan revealed that 544 of 594 total scans (92%) were
processed successfully; 50 were excluded because of classification and
segmentation errors due to motion. Failure rate was significantly higher (
<<...OLE_Obj...>> 21 with Yates correction
= 4.08,
P = .04) in 34 of 317
patients (11%) than in 16 of 277 controls (6%). All remaining scans from
patients with ADHD (283 scans) were used. The comparison group was selected from
a pool of healthy controls after excluding siblings in order not to violate the
statistical assumption of independence. The remaining 139 potential controls
(ie, no more than 1 per family within the age range of our patients) were
selected by the data manager (L.S.C.) to best match each target patient for sex,
age, and longitudinal intervals, prior to morphometric analyses. [Fred A. Baughman Jr., MD:By
"morphomentric" they mean anatomic configuration] Whenever precise
matching on all parameters was not possible, patients and controls were matched
on average-age across their own scans. Because we were unable to match all
patients and controls 1-to-1, we made every effort to maintain proportional
scan-densities across the entire age-range of the 152 patients.
Statistical
Analyses
Demographic and
clinical measures were compared by 2-way analyses of variance (testing main
effects of diagnoses and sex and their interaction) or 2-sample
t tests for continuous
measures, and with <<...OLE_Obj...>> 2 or Fisher
exact test for nominal measures. Analyses of variance of the 10 regional brain
measures and 3 summary measures obtained at initial scan (n = 291 independent
participants) were initially performed with diagnoses and sex as
between-participant factors. Because we did not obtain full-scale IQ scores from
controls, Wechsler vocabulary standard score was used, as it is the single best
predictor of full-scale IQ.27 To account for
between-group differences in vocabulary, height, weight, handedness, and
medication status, analyses of covariance were performed with these potential
covariates. Nonsignificant covariates were deleted from the final models.
Pearson correlations were computed for symptom severity measures and brain
volumes in the patient sample.
To examine
the influence of medications more closely we compared patients with ADHD who
were never previously treated with psychotropic medications (unmedicated ADHD),
medicated patients (medicated ADHD), and controls. [Fred A. Baughman Jr., MD:3 groups: (1)
ADHD-never on any medication; (2) ADHD-medicated ( they do not say, but should,
exact doses and for how long), and (3) normal controls] The unmedicated
ADHD patients were significantly younger than the medicated ADHD and controls;
thus, we confirmed findings in age-matched subgroups (n = 128). All pairwise
comparisons were conducted with Bonferroni corrections. [Fred A. Baughman Jr., MD: The fact that the unmedicated
patients (32% of all ADHD patients) were "significantly younger" means they were
also smaller and possessed of smaller brain. This we are told was handled with a
particular statistical treatment]
[Fred A. Baughman Jr., MD:There were
152 with ADHD, 103 (68%) of whom were medicated and 49 (32%) not medicated. Had the goal of their research
been to demonstrate that ADHD is a disease, perhaps one characterized by brain
atrophy, they would have made this the one and only aim of their research and
would have constituted the largest possible group of (1) never-medicated ADHD
patients, comparing them with a like number of (2) normal controls. This would have eliminated the drugs as
a physical variable. Swanson, at
the CC lamented that they had difficulty recruiting never-drugged ADHD subjects
because all or most are so quickly medicated. This excuse does not fly; thousands of
new diagnoses are made in the US daily, of this their can be no doubt. Such a study could quickly be
constituted and would be the pure study, absent the drugging confounder, that is
needed. To determine whether the drugs are causing the brain
atrophy or not would require a pure study comparing (1) ADHD patients never
drugged to (2) ADHD patients-drugged. It has seemed to me that the NIMH
and research biological psychiatry has, instead, avoided doing these studies,
continuing instead to produce and publicize studies of drugged ADHD subjects
showing brain atrophy, in turn, representing such brain atrophy as due to ADHD; proof it exists, saying
little or nothing to the public of
the almost certain cause, the encepalopathic drugs they are
on.]
Finally, longitudinal analytic methods37, 38 were used to examine growth patterns of caudate, cerebellum, total cerebrum, and the white and gray components of the 4 major lobes. The initial full longitudinal growth model was expressed as a cubic:
Size = Intercept + <<...OLE_Obj...>> 1 <<...OLE_Obj...>> (Age - Mean Age) + <<...OLE_Obj...>> 2 <<...OLE_Obj...>> (Age - Mean Age)2 + <<...OLE_Obj...>> 3 <<...OLE_Obj...>> (Age - Mean Age)3 + <<...OLE_Obj...>>
The model
parameters (intercept and <<...OLE_Obj...>> coefficients)
were initially allowed to reflect interactions between sex and diagnostic group.
To account for within-person correlations, intercepts were treated as normally
distributed random effects that varied by individual, while
<<...OLE_Obj...>> coefficients for age, age-squared, and
age-cubed terms were modeled as fixed effects. The full cubic model was compared
with simpler quadratic, linear, and constant models with interactions. Once the
order of the model was established, testing was performed to determine whether
an additive model could replace the interactions between sex and diagnostic
group for the height and shape parameters of the curves. With respect to shape
of the curves, there were neither significant sex differences nor sex by
diagnosis interactions for any structure. Consequently, final models allowed for
sex and diagnosis effects in the height parameters (intercept) of the curves and
included only diagnostic differences in shape
parameters. [Fred A. Baughman Jr., MD:numberable statistical
treatments]
Hypothesis tests and model selection were based on F statistics. We included data from individuals who had only a single scan (about 40% of both groups), because single scans provide additional information about between-participant variation and overall curve shape. These methods have been useful for combining cross-sectional and longitudinal anatomic MRI data.39-41 Statistical power exceeded 80% at P = .05 for all brain measures. Minimally detectable adjusted differences ranged from 2.7% (caudate and cerebellum) to 5% for occipital gray matter, and averaged 3% for cortical volumes. Statistical analyses were performed using SPSS version 10.0 (SPSS Inc, Chicago, Ill), except for the mixed-model random regression analyses, which were performed with SAS version 8.02 (SAS Institute Inc, Cary, NC), and the power analyses, which were conducted with PASS 2000 (NCSS Statistical Software, Kaysville, Utah). Two-tailed significance levels were defined as P <<...OLE_Obj...>> .05.
RESULTS [Fred A. Baughman Jr., MD:In the studies I suggest above, several years of follow-up and one
set of scans of all is all that would be
required.] As [Fred A. Baughman Jr., MD:None
of the following are physical variables: vocabulary , parent and teacher
attention problem scores, and prevalence of learning
disorders] .Physician's Clinical Global Impressions ratings
reflected significantly greater severity in females, who also had a higher
percentage of combined-type ADHD, mood disorder (history of major depression
and/or dysthymia) and lower prevalence of conduct disorder and tic disorder not
otherwise specified. [Fred A. Baughman Jr., MD:Of these, only tic disorder is a physical
variable; if present prior to any medication it would be called Tourette's
syndrome, if present only after stimulant treatment it would be called
"stimulant-induced tic syndrome/disease] At the time of the first
scan, 103 patients (68%) were being treated with psychostimulants.
<<...OLE_Obj...>>
Participants
Final study
participants consisting of 152 children and adolescents with ADHD and 139
controls were each successfully scanned up to 4 times over a decade.
The 49
[Fred A. Baughman Jr., MD:32% of all ADHD subjects] patients with ADHD (22 females, 27
males) who were successfully scanned before ever being treated with psychotropic
medications (unmedicated ADHD) were significantly younger than the medicated
patients (medicated ADHD) and controls ( [Fred A. Baughman Jr., MD:Which,
without wholly valid statistical adjustment would mean that the ADHD-unmedicated
group, as a whole is younger than ADHD-medicated and controls, making the
ADHD-unmedicated group smaller (in height and weight) and possessed, as well, of
smaller brains. They will argue,
and posit, within their study that they have statistically treated for
this] .
Unmedicated patients with ADHD were rated as comparable in severity by
parents, but as significantly less severely affected by physicians and teachers.
[Fred A. Baughman Jr., MD:As if ADHD severity as judged by physicians, teachers or parents
equated to "brain disease" severity] They also tended to score
higher on the vocabulary IQ subtest, but not significantly (P =
.06).
Sixty-one
patients (40%) were scanned once, 61 (40%) twice, 20 (13%) 3 times, and 10 (7%)
4 times. Fifty-two controls (37%) were scanned once, 55 (40%) twice, 29 (21%) 3
times, and 3 (2%) 4 times. Mean ages at each scan did not differ significantly
between diagnostic groups (at first scan, F1,289 =
2.28,
P = .13; at second
scan, F1,176 = 0.08, P = .78; at third scan,
F1,60 = 0.02, P = .89; at fourth
scan, F1,11 = 1.06, P = .32). Female
participants (mean, 9.7 years [SD, 2.6]) were significantly younger than male
participants (mean, 10.7 years [SD, 3.3];
P = .006), regardless
of diagnosis. Mean intervals between scans did not differ significantly between
diagnostic groups (mean for patients with ADHD, 2.6 years [1.1]; mean for
controls, 2.4 years [1.0]; T229 = 1.60;
P = .11).
[Fred A. Baughman Jr., MD:Again,
had the goal of their research been to demonstrate whether or not, yes or no,
ADHD is a disease characterized by brain atrophy, they would have made this the
one and only aim of their research and would have constituted the largest
possible group of (1) never-medicated ADHD patients, comparing them with a like
number of (2) normal controls. This
would have eliminated the drugs as a physical variable. Swanson, at the CC lamented that they
had difficulty recruiting never-drugged ADHD subjects because all or most are so
quickly medicated. This excuse does
not fly; thousands of new diagnoses are made in the US daily, of this their can
be no doubt. Such a study could
quickly be constituted and would be the pure study, absent the drugging
confounder, that is needed. To
determine whether the drugs are
causing the brain atrophy or not would require a pure study comparing (1) ADHD
patients never drugged to (2) ADHD patients-drugged. It has seemed to me that the NIMH
and research biological psychiatry has, instead, avoided doing these studies,
continuing instead to produce and publicize studies of drugged ADHD subjects
showing brain atrophy, in turn, representing such brain atrophy as due to ADHD; proof it exists, saying
little or nothing to the public of
the almost certain cause, the encepalopathic drugs they are on. Both of the studies I suggest above
would run for 5 years with all subjects matched for sex, and age, have a single,
technically adequate scan at the start of the study and again at the end. Growth of the brain continues, at a much slower
rate than before, until 12-15 years, when the average adult weight of 1230 to
1275 g is females and 1350 to 1410 g in males is attained. Here we see that brain size is very much
a function of age, and that the brain of females is smaller, generally than
males.]
Analyses
of Initial Scans
Table 3
<../fig_tab/joc20194_t3.html> contains the
unadjusted means (SDs) of the 291 initial cross-sectional scans by diagnosis as
well as the means (SEs) adjusted for all significant covariates. Three summary
measures were obtained for the cerebrum, defined by excluding cerebellum,
brainstem, and cerebrospinal fluid.
As
expected,43,
44 all measures were
significantly smaller in female participants [Fred A. Baughman Jr., MD:see above, female brain
smaller than male, with this difference implying nothing about functional
capacity] (F1, 287 ranged from 10.65 for parietal gray
matter to 98.61 for cerebellum;
Effects of
Prior Drug Treatment [Fred A. Baughman Jr., MD:32%]
unmedicated patients with ADHD, 103 medicated patients [Fred A. Baughman Jr., MD:68%] with
ADHD, and 139 healthy controls. Unmedicated patients with ADHD did not differ
significantly from medicated patients with ADHD on any gray matter measures, or
in caudate or cerebellum. By contrast, unmedicated patients with ADHD had
strikingly smaller white matter volumes (F2,288 = 11.65) compared
with controls (-10.7%, [Fred A. Baughman Jr., MD:No
conclusions regarding the functional significance of these findings can be
drawn. The authors, however, draw
the conclusion that these and similar findings explain their ADHD behaviors;
behaviors, Carey asserts, are normal behaviors, having no pathological
significance] Differences between unmedicated patients with ADHD and
controls in frontal (-3.8%) and parietal gray matter (-4.1%) would also have
been significant if not corrected for multiple comparisons. Medicated
patients with ADHD did not differ significantly from controls on any white
matter measure. [Fred A. Baughman Jr., MD:An observation the authors take to mean that
stimulant medications do no damage to the brain] Robust differences
from controls remained for all gray matter measures (ranging from -3.4% to
-6.6%), caudate (-4.3%), cerebellum (-3.6%), and the summary measures of total
cerebral volume (-3.3%) and total gray volume (-3.9%).
Table 4
<../fig_tab/joc20194_t4.html> displays the
contrasts between 3 nonoverlapping groups consisting of 49
Because the
unmedicated patients with ADHD were significantly younger than the other 2
subgroups, and white matter increases with increasing age throughout the age
range,45 we performed
secondary analyses restricted to an age-matched subset of 128 participants
(consisting of 24 unmedicated patients with ADHD, 50 medicated patients with
ADHD, and 54 controls [61 females]). All measures remained essentially
unchanged. [Fred A. Baughman Jr., MD:Again the need for statistical "corrections" of the fact that
the ADHD-unmedicated group-32% of
the total ADHD group were "significantly younger."]
Relationship to
Clinical Measures
We examined
correlations between the 10 regional measures and behavioral ratings. Within the
patient group, smaller volumes were significantly correlated in the expected
direction with greater symptom severity. Frontal and temporal gray matter,
caudate, and cerebellar volumes were significantly and negatively correlated
with physician's Clinical Global Impressions rating (n = 139, Pearson
coefficients ranged between -0.16 for frontal gray and -0.26 for cerebellum,
all
P<.05). The same 4
regions were also significantly and negatively correlated with parent-rated
child behavior checklist attention problems with Pearson coefficients between
-0.16 and -0.22 (all P<.05). Correlations
were largely unaffected when adjusted for age.
Wechsler vocabulary standard score was significantly and positively correlated with all anatomic volumes in patients with ADHD (n = 151; r ranged from 0.19-0.35; all P<.02), and in frontal and occipital gray and white matter and cerebellar volumes in controls (n = 134; r ranged from 0.18-0.24; all P<.02). Although the magnitude of the correlations was greater in patients than in controls, none of the coefficients differed significantly from each other, and all regional volumes correlated significantly with the vocabulary score when the 2 groups were combined (n = 285; eg, for total cerebral volume, r = 0.31; P<.001).
Analyses
of Initial and Follow-up Scans
Sixty percent of all
participants had at least 2 scans (n = 178), including 62 (21%), who had at
least 3 scans and 13 (4%), who had 4 scans obtained at 2- to 3-year intervals.
Data from all 544 resulting scans were used to derive longitudinal growth curves
for patients and controls of both sexes. The age range for male participants
extended between 4.6 and 19.0 years, while female participants ranged between
5.2 and 16.3 years, reflecting our initial focus on males with
ADHD.20
Predicted longitudinal growth curve parameters did not differ significantly between male and female participants except for the height of each curve (intercept) at the corresponding age midpoint, which were significantly higher for males for all measures, regardless of diagnosis (empirical P<.001, derived from F statistics confirmed with permutation tests with 1000 iterations). There were no significant interactions between sex and diagnosis for any developmental growth patterns (intercepts or curve parameters <<...OLE_Obj...>> 1-3). Figure 1 <../fig_tab/joc20194_f1.html> shows the predicted developmental growth curves along with 95% CIs for each group's average total cerebral volume. Developmental curves were significantly higher in controls than in patients with ADHD for total cerebral volume and for all other brain measures. Diagnostic differences in curve height remained significant after adjusting for vocabulary standard score (total cerebral volume, P = .002). There were no significant differences in curve shape between patients and controls, except for caudate. After adjustment for diagnostic differences in total cerebral volume, only caudate (P = .02) and cerebellum (P = .003) remained significantly smaller in patients with ADHD.
Figure 2
<../fig_tab/joc20194_f2.html> depicts unadjusted
predicted growth curves for caudate nucleus and cerebellum. Caudate was the only
region in which the developmental trajectories did not remain statistically
parallel for patients and controls (adjusted,
P = .05). These
differences in shape represent a normalization of caudate volume for patients by
midadolescence. By contrast, diagnostic differences in cerebellar curves
continue throughout our age range (unadjusted,
P<.001;
adjusted, P = .003), with a
nonsignificant tendency toward a greater difference in late adolescence
(unadjusted, P = .10). The general
absence of diagnostic differences in curve shapes indicates that developmental
curves for patients with ADHD, although significantly lower, were essentially
parallel to curves for healthy controls, with the exception of the caudate
nucleus. [Fred A. Baughman Jr., MD:To speak of diagnostic differences is misleading. The brain/part of brain volume
differences described herein are group differences. There is no kind of brain scan that is
of diagnostic value or that can ever diagnose a single case of ADHD or, for that
matter any psychiatric condition.
The reason there is no objective, physical test in all of "biological
psychiatry" is that not a single psychiatric condition, in 35 years of disease
claims, has a proven, demonstrated, demonstrable physical abnormality...not a
gene, not a chemical imbalance, nothing.
Nor does the present study ruin their pristine
record]
COMMENT [Fred A. Baughman Jr., MD:They have proved no such thing] . Rather than reflecting a
selective frontal-striatal effect, volumes were decreased to a comparable extent
in all 4 lobes and were statistically more prominent only in the cerebellum. Our
findings were not ascribable to differences in cognitive level, height, age,
weight, or handedness and were not related to comorbid diagnoses (data not
shown).
<<...OLE_Obj...>>
Fully automated
measures of brain cortical and subcortical volumes from the initial scans of 291
male and female patients show that the cerebrum as a whole and the cerebellum
are smaller in children and adolescents with predominantly combined-type
ADHD
This is the
first neuroimaging study to our knowledge to include a substantial number (n =
49) of previously unmedicated children and adolescents with ADHD.
[Fred A. Baughman Jr., MD:Why, with Nasrallah et al having suggested that stimulant medication
was causing brain atrophy in 1986, has it taken research psychiatry all this
time to address this question, and, at that not yet authoring or performing the
appropriate study necessary to answer the two, separate, fundamental questions
(1) Is ADHD an abnormality/disease-yes or no? and (2) does Ritalin/amphetamine
treatment cause brain atrophy?] We attempted to recruit children
with equivalent severity of ADHD symptoms by using identical diagnostic and
symptom severity criteria. Unmedicated patients with ADHD did not differ from
medicated children with ADHD on parent-rated attention problems, but they had
significantly lower teacher and physician ratings, and higher vocabulary
standard scores. [Fred A. Baughman Jr., MD:as if objective measures] These differences
should have minimized anatomic brain differences between unmedicated patients
with ADHD and controls. In fact, findings were generally as striking for the
unmedicated patients with ADHD as for those who were being treated with
medications, and were more pronounced for white matter volumes.
[Fred A. Baughman Jr., MD:Here, in a single reach, they would have us believe they have
validated, ADHD as a disease, and, at the same time exonerated
Ritalin/amphetamine treatment of all harm to the brain, that so strongly
suggested, time and again by the scanning research of 1986-1998 and the
present]
Thus, our analyses show that decreased brain volumes in ADHD in both white and gray matter compartments are not due to drug treatment. Conversely, we have no evidence that stimulant drugs cause abnormal brain development.46
[Fred A. Baughman Jr., MD:Yes there
is something to treat-ADHD! No! there is nothing to fear from the stimulant
drugs; leave no child untreated, take them from the home of negligent parents
refuse to treat them as is already being done by the hundreds of thousands in
the US today.
]
Patients with ADHD had developmental trajectories for nearly all brain regions that paralleled growth curves for controls but on a lower track. The one exception, foreshadowed by an earlier cross-sectional study,13 was the caudate nucleus, for which differences between patients and controls became negligible by midadolescence. As the caudate nucleus reaches its maximum volume around 10 years, the potential relationship between normalization of caudate volume in ADHD and decreased ratings of hyperactivity/impulsivity in children with ADHD,47 as well as in quantitative measures of movement in normative samples,48 should be addressed in future studies.
Longitudinal follow-up of functional outcome is continuing; hence, we cannot report definitively on the relationship between continuing anatomic deviance or normalization vs outcome. Preliminarily, global functional outcome in 64 patients with ADHD (20 females) evaluated 4 years after initial scan does not suggest any significant relationships between continuing anatomic deviance and clinical follow-up status.
We did not find evidence of a primarily frontal abnormality in ADHD. Instead, we found the smallest diagnostic effect sizes in frontal lobes. However, these results cannot be interpreted as definitive evidence against the frontal-striatal hypothesis of ADHD pathogenesis, because our units of analysis, while highly reliable, were too large. These methods have been useful in detecting age-, sex-, and diagnosis-specific differences in growth curves,39-41, 49 and their application to ADHD was warranted. Alternate approaches, such as unbiased pixel-based analyses,50 may be needed to detect more localized anatomic abnormalities in regions such as cingulate, orbitalfrontal, or dorsolateral prefrontal cortex in patients with ADHD.51 However, these methods may also require even larger or more closely matched contrast groups (eg, twin or sibling controls) given the mostly modest effect sizes and substantial between-subject variations in brain anatomy.52
Limitations of this study include the use of referred samples for patients and highly screened controls that may not be optimally representative. We recruited female patients with ADHD who were comparable in severity with our previous samples of males,53 but in so doing may have selected females who are atypical of most community and clinical samples. We lost significantly more scans from children with ADHD because of excessive motion, but again, this bias should have removed the most symptomatic patients.
In
conclusion, ADHD is associated with about a 3% (adjusted; 4% unadjusted)
decrease in volume throughout the brain. Intriguingly, this decrease is most
marked in white matter of unmedicated patients. Furthermore, with the exception
of caudate nucleus, longitudinal growth curves are roughly parallel, suggesting
that the fundamental developmental processes active during late childhood and
adolescence are essentially healthy in ADHD, and that neuropsychiatric symptoms
appear to reflect fixed earlier neurobiological insults or abnormalities. Future
studies should focus on younger patients being enrolled into controlled
treatment studies while in preschool and on the development of improved
quantitative measures of brain anatomy and of the component endophenotypes of
ADHD.54 Finally, despite the
importance of these findings, anatomic MRI studies remain appropriate only for
research, as they cannot yet contribute to the diagnostic assessment of
ADHD. [Fred A. Baughman Jr., MD:Here, in the final sentence is the confession that MRI for all the millions
of dollars of tax and Pharma money spent on MRI/ADHD research is good for
nothing more than deceiving all who read about it an all who read the press
releases and abstracts (always cleansed of all mention that the brain atrophy,
shrinkage, shriveling that might
just be due to those long-known encephalotoxins: Ritalin and the amphetamines
given us as "treatment" for the never-proved disease; ADHD. Has Castellanos, et al, proven that ADHD
is not a fraud? They have not.
]
Fred A. Baughman Jr., MD: I invite my readers to read on. In the appended material I expand upon many of the studies Castellanos, et al refer to, i.e., that appear in their bibliography.
CT AND MRI SCANS IN ADHD VS. NORMAL
In their joint presentation to the National Institutes of Health, Consensus Conference on ADHD, November 16-18, 1998. James Swanson, Ph.D., of the University of California at Irvine, and F. Xavier Castellanos of the National Institute of Mental Health (NIMH), among the most prominent of ADHD researchers, reviewed the Biological Bases of Attention Deficit Hyperactivity Disorder: Neuroanatomy, Genetic, and Pathophysiology. Who would guess, having heard their title, that there is no biological basis for ADHD.
Swanson and Castellanos wrote [1]: "One of the most important current developments has been the convergence of findings from magnetic resonance imaging studies of brain anatomy (aMRI)." What, I wonder, does 'convergence of findings' mean relative to proof? They continue: "We will present a meta-analysis of studies from several independent laboratories that have reported ADHD/HKD (hyperkinetic disorder, a term used in the UK) abnormalities in two specific but still coarsely defined brain regions of the frontal lobes and basal ganglia. For example, Filipek and colleagues [2] reported that a group of children with ADHD/HKD had brain volumes about 10 percent smaller than normal in anterior superior regions (posterior prefrontal, motor association, and mid-anterior cingulate, anterior inferior regions, and anterior basal ganglia), and Castellanos and colleagues [3] reported that right anterior frontal, caudate, and globus pallidus regions were about 10% smaller in an ADHD/HKD group than in a control group.
"The convergence of findings within and across investigators has not emerged for functional imaging studies using positron emission tomography (PET) [4,5] as it has for aMRI studies." What the authors mean here, is that only anatomic MRI (aMRI) studies have shown abnormalities-atrophy--in ADHD subjects, relative to normal controls.
Swanson, presenting at the Consensus Conference for himself and Castellanos [1], summarized: " Recent investigations provide converging evidence that a refined phenotype of ADHD/HKD is characterized by reduced size in specific neuroanatomical regions of the frontal lobes and basal ganglia."
Nor did Swanson leave any doubt that he was claiming that the brain atrophy he had described was part and parcel of ADHD/HKD (by whatever name)-it's long-sought biological basis (ADD having been conceptualized-invented, for the DSM-III in 1980) [6] Saying these brain abnormalities were a component of the ADHD 'phenotype,' Swanson posited that it had genetic basis-an abnormal 'genotype.' Speaking of 'phenotype' one speaks of the somatic or physical manifestation of all the genes-the genotype. Saying one has one has an abnormal 'phenotype,' one implies an abnormal gene or genes-an abnormal 'genotype' as it's cause.
Baughman, in attendance [7], took the microphone and asked: "Dr. Swanson, why did you not mention that virtually all of the ADHD subjects in the neuroimaging studies have been on chronic stimulant therapy and that this is the likely cause of their brain atrophy?"
Audience: "ooh, wow!"
Swanson: "Well, that's a hypothesis. I don't know the exact numbers of how many were or were not on medication and as I indicated I understand that this is a critical issue and in fact I am planning a study to investigate that. I haven't yet done it."
Fourteen years ago, in a study utilizing computerized, cranial, tomographic scans (CCT), Nasrallah [8] suggested that the Ritalin/stimulant therapy itself was the cause of the brain atrophy.
What then, of the conclusion reached by Swanson and Castellanos, and virtually all other contemporary, ADHD/aMRI researchers-that the brain atrophy is the physical abnormality that makes ADHD a bona fide disease! Unlike Nasrallah [8], they say little or, like Swanson, nothing, of the possibility that the stimulant medication has caused the brain atrophy-the stimulant medication that virtually all of the ADHD subjects were on.
In that the only difference (variable) between the ADHD subjects and the normal controls, was the stimulant drugs that nearly all of the ADHD subjects were on, the only plausible conclusion is that the brain atrophy in ADHD subjects is due to the stimulants they were on.
Why then, does psychiatry tell the public, so insistently, that ADHD is a disease? Why are they told Ritalin/stimulant therapy is safe, and effective. Effective against what? Why, given 14 years of evidence, is it been kept from them that Ritalin/stimulant therapy causes the brain to atrophy, shrivel, shrink?
Acknowledgments that ADHD subjects were on stimulants are sparing and are found only in the small print of original reports. Diabolically, reviews, abstracts and press releases speak only of brain atrophy as a function of the ADHD.
Recall--it was in 1986, that Nasrallah [8], suggested that the brain atrophy in their 'hyperactive' subjects might be due to the stimulant therapy. Had psychiatry really wanted to know, all they would have had to do was an MRI study comparing drug-free, patients with normal controls. Had they done such a study, and found brain atrophy, they would have credible evidence of a physical basis for ADHD. But in all of this time--in the entire 14 years since the Nasrallah report, they have failed to do such a study. They have continued doing MRI studies, comparing ADD/ADHD patients to normal controls, but invariably, the ADD/ADHD subjects have been on brain damaging stimulants.
One wonders if they have actually done a study of drug-free subjects, somewhere along the way, found their brains to be normal, and elected not to publish the 'negative results.' This, after all would leave ADD/ADHD, invalid and the main drugs used to treat this 'non-disease,' the stimulants, a proven cause of brain atrophy. What might the reason be for their continuing to perform the same flawed experiment, time after time, for 14 years. Just as they have avoided performing the one appropriate study--that on drug-free ADD/ADHD subjects, they have carefully avoided including stimulant 'non-responders' in any of their ADD/ADHD subject groups. Could it be that they know that long-term stimulant treatment/exposure is necessary to assure a finding of brain atrophy on a scan--a finding they intended all along to represent as due to ADHD? What other reason could there be. The last thing they want to prove with their research is that the drugs are causing brain shriveling and that ADHD does not exist. Why else would Castellanos tells us in his Reader Digest interview of January, 2000, just as he told us in 1996, just as Swanson told us at the Consensus Conference, in 1998 we should do MRI scans in drug-naïve ADHD subjects, and we plan to, but we just haven't gotten around to it yet.
REVIEW OF CT, MRI SCANS IN ADHD-ALL OF THEM ON STIMULANTS
Nasrallah et al [1986], in a computerized cranial tomography (CCT) study (earlier, not as precise technology, as MRI) of 24 hyperactive subjects, found brain atrophy in more than 50%, leading the authors to conclude: "cortical atrophy may be a long-term adverse effect of this treatment."
Hynd et al [1991], using MRI, compared ADHD children "judged to be favorable responders to Ritalin," and controls. The corpus callosum, the large bundle of nerve fibers connecting the two cerebral hemispheres was found to be smaller in the ADHD group and was said to be due to ADHD. No mention was made of the possibility, actually a probability that the atrophy of the corpus callosum might be due to Ritalin.
Giedd, et al. [1994], using MRI, found the corpus callosum to be smaller in hyperactive boys than in normal controls and attributed it to their ADHD.
Matochik, J.A. et.al, AMJ Psychiatry 1994;151:658. Subjects with ADHD meeting DSM III (1980) criteria for ADHD , the Utah criteria for Attention Deficit Disorder in adulthood, having a definite childhood history of ADD with hyperactivity but no history of any other major psychiatric disorders, were studied before and after a minimum of six weeks of treatment with Methylphenindate, or Deamphetamine. Neither changed global or whole brain metabolism. Having failed to demonstrate abnormalities, with or without stimulant therapy, the authors emphasized that both drugs brought about significant improvement of behavior and strongly indicated that Methylphenindate and Deamphetamine were effective agents in the treatment of adults with ADHD
Castellanos [1994], wrote: "Thirty-nine of the50 patients had been previously treated with psychostimulants, and all patients participated in a 12 week double-blind trial of methylphenidate, d-amphetamine, and placebo, which is described elsewhere." "The normal pattern of slight but significantly greater right caudate volume across all ages was not seen in ADHD." "Total brain volume was 5% smaller in the ADHD boys..."
The majority of these patients, too, were treated, either with methylphenidate (Ritalin) or d-amphetamine (Dexedrine). Here we have another study in which stimulant exposure in the ADHD group is the only physical variable, and, the likely cause.
Lyoo, et al, [1996], studied 45 males and 6 females (51
total) with ADHD, and 28 controls.
Those with ADHD had a significantly
larger posterior lateral ventricles [Fred A. Baughman Jr., MD:when brain tissue atrophies,
the ventricles, filled with spinal fluid, enlarge, taking up the space vacated
by brain matter] . A number of
those in the ADHD group had co-existent conduct disorder, a second, confounding
diagnosis, also, never proved to be a disease. The majority were also on
stimulants.
Castellanos et al [1996], took magnetic resonance images (scans) of the brains of 57 boys, 5-18 years of age, said to have attention deficit hyperactivity disorder (ADHD) and of 55 "healthy" age-matched controls. Those in the ADHD group were found to have significantly smaller, atrophic brains (diminution of total cerebral and cerebellar volume relative to the " healthy"controls), and the loss, at many sites, of right more than left asymmetry (where right-sided structures are normally larger than that on the left) leading The authors conclude that the differences found in the ADHD group were "consistent with (previously) hypothesized (but never proven) dysfunction of right-sided prefrontal (front, right half, of the brain)-striatal (right sided, deep-lying nuclei, or cell groups) systems in ADHD." In a nutshell, Castellanos, et al, concluded that the abnormalities found were due to ADHD, exactly as previously hypothesized-tending to prove that ADHD, virtually always diagnosed by elementary school teachers, armed with a pencil-paper behavior rating scale, is, indeed, a "brain disease"-something frequently claimed, but never proven, to that date. A further indication that Castellanos, et al, were convinced that they had proof in hand that ADHD to be a disease, was their reference, must unscientifically, in the text of their article, to the normal control group as "'healthy' matched controls," leaving no doubt that the authors considered the ADHD subjects to be "unhealthy," or "diseased."
If the 1996 Castellanos article was the first "proof" that ADHD is an actual disease with confirmatory, characteristic abnormalities of the brain, what proof were Castellanos and his NIMH colleagues referring to when, in NIH Publication 94-3572 "Attention Deficit Hyperactivity Disorder-Decade of the Brain" (1994), with "Scientific information and review (was) provided by NIMH staff members (Castellanos, included)..." in which they refer to ADHD as "the disease" (page 7). It is my understanding of the ADHD scientific literature, although voluminous and weighty, that there was, to that time, no proof that ADHD was a disease or a medical syndrome (about the same thing as a disease) with a confirmatory physical or chemical abnormality (pathology). Be that as it may-what about the current claim of Castellanos, et al, that the MRI abnormalities in the current study comprise the long awaited, frequently claimed, proof that ADHD is a "disease." There is fine print within the article that bears scrutiny, forcing us to draw a very different conclusion. Under "Subjects with ADHD," was written "Fifty-three of them (of the 57 with ADHD) had been previously treated with psychostimulants, and 56 participated in a 12-week, double-blind trial of methylphenindate, dextoamphetamine and placebo..."
Under "Comment," running fully a page and a half, is found the brief acknowledgement: "Because almost all (93%) subjects with ADHD had been exposed to stimulants, we cannot be certain that our results are not drug related." This did not, however, deter Castellanos, et al, from stating, at the end of their "Comments": In summary, we have found decreased volume of several candidate brain regions previously hypothesized to be involved in the pathophysiology of ADHD..."
In 1997, Filipek, et al, undertook volumetric MRI analysis "To test by MRI...the a priori hypotheses that developmental anomalies exist in attention-deficit hyperactivity disorder in left caudate and right prefrontal frontal/ and or/ posterior parietal hemispheric regions in accord with neurochemical, neuronal circuitry and attentional framework hypotheses, and prior imaging studies."
"All subjects with ADHD had been placed on medication for at least 6 months prior to the study and were felt to be responding favorably at the time of the MRI." Five of the subjects had not previously responded to methylphenidate or dextroamphetamine but responded to non-stimulant medication. Nonetheless, Filipek et al, conclude: "This study is the first to report localized hemispheric structural anomalies in ADHD..."
Berquin , et al. (1998) undertook an MRI study of the cerebellum in attention-deficit hyperactivity disorder. In 46 boys with ADHD, vermal (vermis or the cerebellum) volume was significantly less than in the 47 matched controls. From 'methods' we read, 'The 46... boys with ADHD were recruited for a drug-treatment study and were included in a prior report," The DSM-III-R, 1987 was used for diagnosis herein.
Berquin et al commented on the association of cerebellar atrophy with alcohol and acknowledged they could not fully rule out fetal alcohol exposure. Making mention of alcohol exposure as a possible contributor to cerebellar atrophy and acknowledging that all of their patients (number = 46) were recruited from the among the 57 subjects in the study of Castellanos, et al, 93% of whom had been on stimulant therapy, Berquin, et al made no mention, as did Castellanos, of the fact that "Because almost all (93%) subjects with ADHD had been exposed to stimulants, we cannot be certain that our results are not drug related." Clearly the cerebellar atrophy described in this study could have been, and probably was, stimulant induced.
1999, Mostofsky: Brain abnormality linked to ADHD, April 20, 99 (Reuters Health) -- Compared with other children of the same age, children with attention deficit hyperactivity disorder (ADHD) have a smaller brain volumes, particularly smaller amounts of gray matter in the right frontal area of their brains, "There is a lot of evidence that the brain's right hemisphere is dominant in attentional processes," said study author and neurologist Stewart Mostofsky, MD, of the Kennedy Krieger Institute and Johns Hopkins School of Medicine in Baltimore. "Abnormalities in the brain's right frontal structure and function may be contributing to the behavioral impairments associated with ADHD." Along with less right frontal gray matter, there searchers also found that ADHD patients had smaller volumes of left frontal gray matter as well as right and left frontal white matter when compared to children without ADHD. The study included 12 boys diagnosed with ADHD and 14 boys without ADHD. All boys were between the ages of seven and 13. Nothing was said of drug status in the press release, I have had no answer to my letter of inquiry to Mostofsky, and there is no evidence as of July, 2000, that this work has been published.
Semrud-Clikeman M, et al [2000] Notes on Using MRI to Examine Brain-Behavior Relationships in Males with Attention Deficit Disorder With Hyperactivity. Semrud-Clikeman M, et al. J. Am Acad Child Adolesc. Psychiatry, 2000, 39 (4):477-484.
Under METHOD, subjects: "The volumetric MRI measures from these subjects, who were participants in a larger study, have been reported previously by Filipek et al (1997). Ten children with ADD/H from the previous study and 11 normal controls were selected."
"Volumetric" means structural, morphological. By repeat reading of manuscript I get the impression that the ADD/H subjects were scanned for the 1997 study and not since. Dates of the MRI and of psychometric tests are not given. This means that all 10 of the ADD/H subjects (just the MPH responders) herein were subjects in the previous Filipek (1997) study. This study's purpose is to correlate previous MRI scan findings to current (or whenever) psychometric "neuropsychological" tests (not merely to do MRI scans on ADHD subjects). And yet I do not see specific dates of either MRIs or the psychometric tests. This study assumes these abnormalities are part of ADD/H, at least in treatment- responding ADD/H subjects, and has as it's main intent to perform psychometric tests and correlate them with the brain changes i.e., smaller volume of the left caudate head; smaller volume of white matter of the right frontal lobe. These are pipe-dreams. We regularly see large, asymptomatic frontal and temporal lobe tumors in particular with no behavior changes and no IQ or other psychometric changes. We regularly see patients with dementia as in Huntington's disease, with clear, disabling behavioral abnormality but normal psychometric batteries. I have seen children with clear mental/educational subnormality with false normal psychometric test results. To hope for and test for such correlations is a pipe-dream.
"Since structural differences varied depending on response/nonresponse to stimulant medication within the ADD/H group in our previous study (Filipek, 1997) participants were selected to be as homogeneous as possible on this variable (responders only) to control for a possible confounding variable." This was their excuse for eliminating ADD/H non-responders and therefor, non-exposed and not brain-damaged by the MPH. They know, I suspect that ADHD none-responders, therefore MPH non-exposed would look like ADHD (untreated) which looks like, indistinguishable from normal.
I think they know that ADD/H non-responders, therefore not on MPH for long would have normal MRI scans. For this reason they eliminate them from the study. It appears they know the ADD/H responders (and therefore long on the drugs) would be the only ones to have brain atrophy/changes. But do they speak of the drug being the cause of the changes, of course not, of children with ADHD being normal, having normal brains-of course not. "Using DSM-III criteria (1980) we selected 10 children with ADD/H (called ADD in 1980) because they were favorable responders..."...and because they were long exposed to the brain-toxic effects of MPG and would have brain atrophy on their MRI.
"Written informed consent had been obtained from all parents/guardians, and written assent was obtained from all and "written assent was obtained from each child and adolescent for all procedures." [fb-it would be important to subpoena these docs to analyze them for flaws of informed consent, how represent the condition, the risks of rx.]
The ADD/H group was recruited from a pediatric psychopharmacology clinic at Mass. Gen. Hosp., results previously reported by Filipek, 1997. All children met criteria for ADHD (DSM III R, 1987), and DSM III (1980) ADD-with-hyperactivity. [fb however ADD-1980, ADHD-1987 and ADHD-1994 are 3 different and not strictly comparable constructs [See Ernst]
All ADD/H subjects taking methylphenidate for a least 6 months and were judged to be responders in all settings by authors RS or JB
What were the ages and dates of MRI scans of the 10 subjects. Were they done at or prior to the 97 Filipek report. Were they done then and another time, prior to this year 2000 report or just prior to this, the year 2000 report? What were dates of MRI scans (one or more) and of psychometric testing? Were they at about the same times, as one would have hoped, or were they at different times, different months or years.
"Since response to stimulant medication [fb-exposure] was linked to structural differences in children with ADD/H in our previous study (Filipek, 1997) the non-responders [fb-those not responding to it and not kept on it, i.e., those with least exposure] were excluded from the present study to control for medication response."
What they posit with this is that (1) ADD/H (not responding to Ritalin) is one disease with one particular brain abnormality, and that (2) ADD/H responding is another disease altogether with it's own particular brain abnormality. What they conclude with this study is that the MRI abnormalities reported herein are those due to (2). They have avoided doing MRIs on a relatively normal, unexposed group-group (1). They have not acknowledged that ADD/H - untreated are normal or that the cause of the MRI abnormalities might be due to MPH effect on the previously normal brains of ADD/H.
ADHD (untreated) = normal = normal brain and body
normal + MPH (known brain toxin) = brain atrophy due to MPH exposure
ADHD + MPG = brain atrophy due to MPH
ADHD (nonresponder and therefore not kept on it exposed = normal MRI, little, if any brain damage, i.e., no brain atrophy of MPH exposure.
"Furthermore, brain structural differences in children with ADHD, predominantly inattentive type, have not been studied." This type is from the 1994, DSM-IV construct, which was not employed in the diagnosis of these subjects. The Filipek ('97) subjects were likely recruited post 80 and post 87 using DSM III and III-R criteria.
From the abstract: 10 males with ADD/H (8-17 and 11 controls (9-18) with neuropsychologic evaluation and MRI scan.
MPH = methylphenidate
Results:
"As had been reported previously by these authors, the children with ADD/H were found to have reversed asymmetry of head of the caudate, smaller volume of the left caudate head; smaller volume of white matter of the right frontal lobe."
"There is emerging evidence that compromised brain morphology of selected regions (above) is related to behavioral measures of inhibition and attention."
However, Breggin (In Breggin, P.R. Brain Disabling Treatments in Psychiatry, p 172) points out the likelihood that these patients, in a day treatment program, were on stimulants or multiple psychotropic drugs and that the authors failed to discuss the issue of drugs at all. Breggin concludes: There is reason to suspect that this is another incriminating study in regard to brain damage from Ritalin. That the authors don't even mention the drug history of the children-and that the journal editor didn't insist upon the details-is very telling about the willingness of modern psychiatry to deny the potential damage of its treatments. The January, 2000, Reader's Digest confession of Castellanos that, to that date, there were no such studies in drug-naïve ADHD subjects, covers all studies in print, this one, and that of Semrud-Clikeman, et al, (accepted for publication, 10/5/99) included. Giedd, like Castellanos is from the NIMH, therefore the ADHD subjects in this study may be one-and-the-same as those used in other studies from the NIMH or NIMH sponsored research. Tannock (1988) points out that neuroimaging studies of ADHD come primarily from 3 centers. It appears to me in reading this literature not only that the same ADHD patients are the subjects in several different reports, but that the same scans of the same subjects may be reported in multiple publications. [fb-my suspicion is that they include 'Ritalin reponders,' knowing they have been on long-term Ritalin, knowing that the Ritalin is the only physical variable, and the likely cause of the callosal atrophy, and then they have an abnormality to represent 'as due to the ADHD.' Ritalin-nonresponders would not long stay on the Ritalin, would likely have normal looking brains on MRI scan, and for this reason are excluded.]
Fb-again all of the human beings who are their research subjects, or nearly all, regardless of the psychiatric disorder have been on a drug or drugs. The only real, proven, organic abnormalities they find, attribute to the psychiatric disorder, report, and hold press conferences on, are those due to the drugs they give to the subjects, all of whom were physically normal until the drugs were begun. What they do and represent as science, medicine and research is absolutely unthinkable-pure duplicity. It would be fascinating indeed to take 1, 5 or 10 NIMH research subjects and track how many reports they prove to be participants in, per 5 or 10 years. I find it hard to follow their methods when they refer to subjects described not in the report one is reading but in one published at some prior date, as we have here with Casey et al, making use of subjects from the Castellanos, 96 report. Sure this may be difficult to assail in court but eminently possible, an with persistence it is a house of cards that will all tumble down. Consider the end of the day conclusions of all of their research. Here from the recent neuroimaging review of Hendren, et al, J Am Acad Child Adol Psychiatry 2000, 39 (7):815-828, a review of the neuroimaging of