Hostname: page-component-7b7567c8c-jswmv Total loading time: 0 Render date: 2026-11-15T16:43:12.966Z Has data issue: false hasContentIssue false

Multiple measures of hemispheric dysfunction in schizophrenia and depression

Published online by Cambridge University Press:  09 July 2009

Sid J. Schneider*
Affiliation:
Franklin Delano Roosevelt Veterans Administration Medical Center, Montrose, New York, USA
*
1Address for correspondence: Dr Sid J. Schneider, Franklin Delano Roosevelt Veterans Administration Medical Center, Montrose, NY 10548, USA.

Synopsis

Electrodermal, electroencephalographic and perceptual measures of lateral hemispheric function were obtained from groups of chronic schizophrenics, depressives and normals on 2 occasions, separated by 4 weeks. The measures of hemispheric function were derived from previous research. About half of the schizophrenics were medicated on both occasions; the other schizophrenics underwent drug ‘washout’ before the first session. Results revealed that the measures of laterality were not strongly intercorrelated. In the perceptual task, the schizophrenics and normals displayed different laterality effects. Unlike the normals, the schizophrenics' left hemisphere function appeared to be inferior to the right hemisphere function in the perceptual task. The laterality effects of the depressives and normals differed on two electrodermal measures: skin conductance level and skin conductance response amplitude. The depressives' electrodermal activity from the right hand was diminished as compared with the left hand; the normals did not show this effect. Medication decreased electrodermal activity in the schizophrenics, but had no significant effect on laterality. These results suggest that the various measures of laterality used singly in previous research in psychopathology may not all assess the same phenomenon.

Information

Type
Research Article
Copyright
Copyright © Cambridge University Press 1983

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable