Neuropsychological Function in Schizophrenia

TLDR

Memory and learning deficits have been noted in schizophrenia, but their selective severity relative to other functions has not been clearly established. The study aimed to investigate the specificity of this neuropsychological profile. Thirty‑six unmedicated DSM‑III‑R schizophrenia patients and 36 matched controls were given a standardized battery of neuropsychological tests. Patients exhibited generalized cognitive impairment with a selective deficit in memory and learning, no frontal system deficits, and the pattern supports a prominent role for the temporal‑hippocampal system in schizophrenia pathophysiology.

Abstract

• Unmedicated schizophrenic patients (according to<i>DSM-III-R</i>criteria) (n = 36) and age-matched normal controls (n = 36), balanced for parental socioeconomic status, were administered a battery of standardized neuropsychological tests. Patients showed generalized impairment relative to controls and a selective deficit in memory and learning compared with other functions. Selective impairment was not found on tests related to frontal system function (abstraction, verbal fluency, and motor). The observed pattern is consistent with greater involvement of the temporal-hippocampal system, against the background of diffuse dysfunction. Although impairment in memory and learning has been reported, the selectivity and relative severity compared with other behavioral functions have not been recognized. The specificity of this profile merits further examination. These findings lend support to the hypothesized importance of the temporal-hippocampal region in understanding the pathophysiology of schizophrenia.