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Smaller left Heschl's gyrus volume in patients with schizotypal personality disorder.
Full Abstract
OBJECTIVE:
Individuals with schizophrenia spectrum disorders evince similar genetic, neurotransmitter, neuropsychological, electrophysiological, and structural abnormalities. Magnetic resonance imaging (MRI) studies have shown smaller gray matter volume in patients with schizotypal personality disorder than in matched comparison subjects in the left superior temporal gyrus, an area important for language processing. In a further exploration, the authors studied two components of the superior temporal gyrus:
Heschl's gyrus and the planum temporale.
METHOD:
MRI scans were acquired from 21 male, neuroleptic-naive subjects recruited from the community who met DSM-IV criteria for schizotypal personality disorder and 22 male comparison subjects similar in age. Eighteen of the 21 subjects with schizotypal personality disorder had additional comorbid, nonpsychotic diagnoses. The superior temporal gyrus was manually delineated on coronal images with subsequent identification of Heschl's gyrus and the planum temporale. Exploratory correlations between region of interest volumes and neuropsychological measures were also performed.
RESULTS:
Left Heschl's gyrus gray matter volume was 21% smaller in the schizotypal personality disorder subjects than in the comparison subjects, a difference that was not associated with the presence of comorbid axis I disorders. There were no between-group volume differences in right Heschl's gyrus or in the right or left planum temporale. Exploratory analyses also showed a correlation between poor logical memory and smaller left Heschl's gyrus volume.
CONCLUSIONS:
Smaller left Heschl's gyrus gray matter volume in subjects with schizotypal personality disorder may help to explain the previously reported abnormality in the left superior temporal gyrus and may be a vulnerability marker for schizophrenia spectrum disorders.
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Author information
Author/s: Dickey, Chandlee C (CC); McCarley, Robert W (RW); Voglmaier, Martina M (MM); Frumin, Melissa (M); Niznikiewicz, Margaret A (MA); Hirayasu, Yoshio (Y); Fraone, Stephanie (S); Seidman, Larry J (LJ); Shenton, Martha E (ME);
Affiliation: Harvard Medical School, Clinical Neuroscience Division, Department of Psychiatry, VA Boston HealthCare System, Brockton, MA 02401, USA.
Grants: MH-01110 (Agency:United States NIMH) ; MH-40799 (Agency:United States NIMH) ; MH-50740 (Agency:United States NIMH) ; MH-52807 (Agency:United States NIMH)
Journal and publication information
Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Research Support, U.S. Gov't, P.H.S.
Journal: The American journal of psychiatry (Am J Psychiatry), published in United States. (Language: eng)
Reference: 2002-Sep; vol 159 (issue 9) : pp 1521-7
Dates: Created 2002/08/30; Completed 2002/09/20; Revised 2007/11/14;
PMID: 12202272, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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