Physiological Dysfunction of Dorsolateral Prefrontal Cortex in Schizophrenia: III. A New Cohort and Evidence for a Monoaminergic Mechanism

Daniel R. Weinberger, Karen Faith Berman, Barbara P. Illowsky

Research output: Contribution to journalArticle

Abstract

We previously reported that compared with normals, patients with chronic schizophrenia have reduced regional cerebral blood flow (rCBF) in dorsolateral prefrontal cortex (DLPFC) during performance of the Wisconsin Card Sort Test (WCS), a DLPFC-related cognitive task, but not during nonprefrontal tasks, such as a simple number-matching (NM) test. We also found that unlike normals, patients failed to activate DLPFC during the WCS over their own baseline (NM) level. To explore the reproducibility of these findings, a new cohort of 16 medication-free patients underwent a series of xenon 133 inhalation rCBF studies under the following conditions: at rest, while performing the WCS, and while performing NM. The results confirmed our earlier findings. In addition, the concentrations in cerebrospinal fluid of homovanillic acid and 5-hydroxyindoleacetic acid correlated with prefrontal rCBF during the WCS but not during the NM test or at rest. The results show that behavior-specific hypofunction of DLPFC in schizophrenia is reproducible, and they implicate a monoaminergic mechanism.

Original languageEnglish (US)
Pages (from-to)609-615
Number of pages7
JournalArchives of general psychiatry
Volume45
Issue number7
DOIs
StatePublished - Jul 1988
Externally publishedYes

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ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Psychiatry and Mental health

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