Neuroanatomical abnormalities in adolescents with attention-deficit/hyperactivity disorder.
OBJECTIVE
Several neuroanatomic abnormalities have been reported in patients with attention-deficit/hyperactivity disorder (ADHD). However, findings are not always consistent, perhaps because of heterogeneous subject samples. Studying youths with documented familial ADHD provides an opportunity to examine a more homogeneous population.


METHODS
Twenty-four youths with a confirmed history of familial ADHD and 10 control youths underwent high-resolution structural magnetic resonance imaging examinations. Archived magnetic resonance imaging scan data from 12 control youths were included in the analysis to increase statistical power. Individually drawn region-of-interest methods were used to examine the frontal lobe gyri and caudate.


RESULTS
Cerebral total tissue was similar between groups. The volumes of the right caudate and right inferior frontal lobe were larger in the ADHD youths compared with the control youths. Data from a subgroup of the ADHD youths suggest that increasing left caudate volume is associated with decreasing functional activation of this region.


CONCLUSIONS
Because previous studies have focused primarily on younger subjects or used an extended age range, the present results may reflect neurodevelopmental changes specific to late adolescence in familial ADHD.
Garrett
Amy
A
Center for Interdisciplinary Brain Sciences Research, Department of Psychiatry, Stanford University, CA 94305-5795, USA. agarrett@stanford.edu
Penniman
Lauren
L
Epstein
Jeffery N
JN
Casey
B J
BJ
Hinshaw
Stephen P
SP
Glover
Gary
G
Tonev
Simon
S
Vitolo
Alan
A
Davidson
Matt
M
Spicer
Julie
J
Greenhill
Laurence L
LL
Reiss
Allan L
AL
D000293:Adolescent; D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis* / Q000235:genetics; D002421:Caudate Nucleus / Q000473:pathology*; D002648:Child; D004292:Dominance, Cerebral / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D005625:Frontal Lobe / Q000473:pathology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D008297:Male; D009929:Organ Size / Q000502:physiology