Is it possible to be schizophrenic yet neuropsychologically normal?

Neuropsychology. 1997 Jul;11(3):437-46. doi: 10.1037//0894-4105.11.3.437.

Abstract

This study identified and characterized a group of schizophrenic patients without neuropsychological (NP) impairment. A comprehensive NP battery was administered to 171 schizophrenic outpatients and 63 normal comparison participants. Each participant's NP status was classified through blind clinical ratings by 2 experienced neuropsychologists; 27% of the schizophrenics were classified as NP normal. The NP-normal and NP-impaired schizophrenics were similar in terms of most demographic, psychiatric, and functional characteristics, except that NP-normal patients had less negative and extrapyramidal symptoms, were on less anticholinergic medication, socialized more frequently, and were less likely to have had a recent psychiatric hospitalization. The existence of NP-normal schizophrenics suggests that the pathophysiology underlying the cognitive deficits often associated with schizophrenia may be distinct from that causing some of its core psychiatric features.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adult
  • Aged
  • Antipsychotic Agents / administration & dosage
  • Basal Ganglia Diseases
  • Cholinergic Antagonists / administration & dosage
  • Cognition Disorders / classification
  • Cognition Disorders / physiopathology*
  • Female
  • Hospitalization
  • Humans
  • Male
  • Middle Aged
  • Neuropsychological Tests
  • Schizophrenia / physiopathology*
  • Social Behavior

Substances

  • Antipsychotic Agents
  • Cholinergic Antagonists