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Type: Journal article
Title: Impaired updating of working memory in schizophrenia
Author: Galletly, C.
McFarlane, A.
Clark, C.
Citation: International Journal of Psychophysiology, 2007; 63(3):265-274
Publisher: Elsevier Science BV
Issue Date: 2007
ISSN: 0167-8760
Statement of
Cherrie A. Galletly, Alexander C. MacFarlane, C. Richard Clark
Abstract: This study investigated working memory in schizophrenia, using an auditory target detection task specifically designed to separate out brain activity related to the updating of working memory with new information from activity related to target detection and response. Event related potentials (ERPs) were recorded during task performance, using 31 electrodes, from 25 subjects with schizophrenia and 25 matched controls. Subjects with schizophrenia had a reduction in parietal P3 and Late Slow Wave amplitude in the ERP waveforms recorded when the task required subjects to remember a new stimulus. This P3 amplitude attenuation correlated with symptom measures of preoccupation and poor volition. Previous findings of a reduction in P3 amplitude during target detection by subjects with schizophrenia were replicated. These results suggest that there is a specific impairment in the ability to update working memory in schizophrenia, and that this is associated with poverty of engagement with the environment.
Keywords: Humans
Memory Disorders
Matched-Pair Analysis
Case-Control Studies
Memory, Short-Term
Pattern Recognition, Physiological
Evoked Potentials, Auditory
Reference Values
Signal Detection, Psychological
Discrimination, Psychological
Description: Copyright © 2006 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.ijpsycho.2006.11.004
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Appears in Collections:Aurora harvest 6
Psychiatry publications

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