Reductions in frontal, temporal and parietal volume associated with the onset of psychosis.
BACKGROUND
Volumetric MRI abnormalities similar to those evident in schizophrenia are also evident in people at very high risk of psychosis. Which volumetric abnormalities are related to psychotic illness, as opposed to vulnerability to psychosis is unclear. The aim of the study was to compare regional gray matter volume in people before and after the onset of psychosis using a within-subject prospective design.


METHODS
MRI data were acquired from individuals when they presented with an at-risk mental state (ARMS, n=20). Over the following 3 years, 10 subjects developed psychosis and 10 did not. Subjects were re-scanned after the onset of psychosis or at the end of follow-up if they did not become psychotic. Images were processed and analyzed using voxel-based morphometry (SPM5).


RESULTS
In subjects who developed psychosis there were longitudinal volume reductions in the orbitofrontal, superior frontal, inferior temporal, medial and superior parietal cortex, and in the cerebellum. There were no longitudinal changes in subjects who did not develop psychosis.


CONCLUSIONS
The onset of psychosis was associated with a reduction in gray matter volume in frontal, temporal and parietal cortex. These abnormalities may be particularly associated with psychotic illness, as opposed to a vulnerability to psychosis.
Borgwardt
Stefan J
SJ
Psychiatric Outpatient Department, University Hospital Basel, Petersgraben, CH-031 Basel, Switzerland. sborgwardt@uhbs.ch
McGuire
Philip K
PK
Aston
Jacqueline
J
Gschwandtner
Ute
U
Pflüger
Marlon O
MO
Stieglitz
Rolf-Dieter
RD
Radue
Ernst-Wilhelm
EW
Riecher-Rössler
Anita
A
D000328:Adult; D001284:Atrophy / Q000473:pathology; D001931:Brain Mapping; D002531:Cerebellum / Q000473:pathology; D005260:Female; D005625:Frontal Lobe / Q000473:pathology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D038801:International Classification of Diseases; D008137:Longitudinal Studies; D008279:Magnetic Resonance Imaging / Q000379:methods / Q000706:statistics & numerical data; D008297:Male; D010296:Parietal Lobe / Q000473:pathology*; D012559:Schizophrenia / Q000175:diagnosis / Q000473:pathology*; D013702:Temporal Lobe / Q000473:pathology