title: Regional differentiation of cortical activity in schizophrenia: a complementary approach to conventional analysis of regional cerebral blood flow.
abstract: This study examines an alternative to a narrow locus-of-dysfunction cortical pathophysiology in schizophrenia, which in turn suggests a modified approach to the analysis of data from regional cerebral blood flow studies. The results provide qualified support for a model of impaired differentiation of cortical activity in schizophrenia. As an index of the differentiation of cortical fields, regional gradients of cortical blood flow were examined. Medicated patients (n = 15) failed to show the differentiation of networks in frontal areas during a verbal memory recognition task observed in normal comparison subjects (n = 15). Unmedicated patients (n = 15) at rest tended to lose normal lateralization and had increased gradients in the right frontal area compared with normal comparison subjects.
mesh_terms: D000328:Adult; D014150:Antipsychotic Agents / Q000627:therapeutic use; D001143:Arousal / Q000502:physiology*; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000098:blood supply / Q000000981:diagnostic imaging* / Q000187:drug effects; D004292:Dominance, Cerebral / Q000187:drug effects / Q000502:physiology; D005260:Female; D005625:Frontal Lobe / Q000098:blood supply / Q000000981:diagnostic imaging / Q000187:drug effects; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D011939:Mental Recall / Q000187:drug effects / Q000502:physiology; D011569:Psychiatric Status Rating Scales; D011877:Radionuclide Imaging; D012039:Regional Blood Flow / Q000187:drug effects / Q000502:physiology; D012559:Schizophrenia / Q000000981:diagnostic imaging* / Q000188:drug therapy / Q000503:physiopathology; D012565:Schizophrenic Psychology; D014706:Verbal Learning / Q000187:drug effects / Q000502:physiology; D014980:Xenon Radioisotopes
chemical_list: D014150:Antipsychotic Agents; D014980:Xenon Radioisotopes