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Delbert Robinson, MD; Houwei Wu, MD; Rafael A. Munne, MD; Manzar Ashtari, PhD; Jose Ma. J. Alvir, DrPH; Gail Lerner, MS; Amy Koreen, MD; Karyl Cole, MD; Bernhard Bogerts, MD

Arch Gen Psychiatry. 1995;52(5):393-398.

Abstract
Background
Current hypotheses about the neuroanatomical structures involved in obsessive-compulsive disorder (OCD) suggest abnormalities in cortical-striatalthalamic-cortical circuits. This study examined selected brain regions within or adjacent to these circuits.

Methods
Magnetic resonance imaging scans from 26 patients with OCD and 26 healthy controls were analyzed to determine the volumes of the following structures: prefrontal cortex (cortex anterior to the genu of the corpus callosum), caudate nucleus, lateral and third ventricles, and whole brain.

Results
Patients with OCD had significantly smaller caudate nucleus volumes than controls (F [1,48] =9.4, P=.004) but did not differ in prefrontal cortex size or in volumes of the lateral or third ventricles. Structural volumes were not significantly correlated with the duration or severity of OCD symptoms.

Conclusion
Our findings provide additional evidence for pathological involvement of the caudate in OCD.

Author Affiliations
From the Hillside Hospital, Psychiatry Research, Glen Oaks, NY (Drs Robinson, Wu, Munne, Alvir, Koreen, and Cole); Department of Psychiatry, Albert Einstein College of Medicine, New York, NY (Drs Robinson, Alvir, Koreen, and Cole); Department of Radiology, Long Island Jewish Medical Center, New Hyde Park, NY (Dr Ashtari); Department of Preventive Cardiology, St Francis Hospital, Roslyn, NY (Ms Lerner); and Department of Psychiatry, University of Magdeburg (Germany) (Dr Bogerts).

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