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Gordon J. Harris, PhD
Division of Psychiatric Neuroimaging The Johns Hopkins Medical Institutions 600 N Wolfe St, Meyer 3-166 Baltimore, MD 21287-7362

Godfrey D. Pearlson, MA, MB BS
Baltimore, Md

Rudolf Hoehn-Saric, MD
Baltimore, Md

Arch Gen Psychiatry. 1993;50(6):498-499.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

The report by Rubin et al¹ on single-photon emission computed tomography (SPECT) of regional cerebral blood flow in patients with obsessive-compulsive disorder (OCD) referred to our previous article.² They noted that ours was the only other patient-control SPECT study of OCD to date. We reported increased "medial-frontal" cortical blood flow in patients with OCD compared with controls, but no difference in "orbital-frontal" flow as defined previously by Baxter et al.^3,4 Rubin et al concluded that they had found increased orbital-frontal perfusion in their group of patients with OCD.

However, a comparison of the regions defined as orbital-frontal in their group and medial-frontal in our study shows that these regions differ more in name than in anatomical location, and that both are different from the orbital-frontal regions defined by Baxter et al.^3,4 Both the medial-frontal region in our study and the orbital-frontal region in the study by . . . [Full Text PDF of this Article]

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