TY - JOUR
T1 - Cortical dysfunction in schizophrenia during auditory word and tone working memory demonstrated by functional magnetic resonance imaging
AU - Stevens, Alexander A.
AU - Goldman-Rakic, Patricia S.
AU - Gore, John C.
AU - Fulbright, Robert K.
AU - Wexler, Bruce E.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1998/12
Y1 - 1998/12
N2 - Background: Verbal learning and memory deficits are among the most severe cognitive deficits observed in schizophrenia. We have demonstrated that such deficits do not extend to working memory for tones in a substantial number of patients even when verbal working memory is impaired. In this study we used functional magnetic resonance imaging to study the neural basis of this dissociation of auditory verbal and nonverbal working memory in individuals with schizophrenia. Methods: While undergoing functional magnetic resonance imaging, 12 schizophrenic patients and 12 matched control subjects performed auditory Word Serial Position Task and Tone Serial Position Task. Results: Both tasks produced activation in frontal cortex and temporal and parietal lobes of the cerebrum in both groups. While robust activation was observed in the left inferior frontal gyrus (areas 6, 44, and 45) in the control group during the Word Serial Position Task, activation in the patient group was much reduced in these areas and failed to show the same task- specific activation as in controls. Reduced activation in patients was not confined to the inferior frontal gyms, but also extended to a medial area during the Tone Serial Position Task and to premotor and anterior temporal lobe areas during both tasks. Conclusions: These findings support the hypothesis that abnormalities in Cortical hemodynamic response in the inferior frontal gyrus underlie the verbal working memory deficit in schizophrenia. The relationship of verbal working memory deficits to other cognitive functions suggests that abnormal functioning in the speech-related areas may reflect a critical substrate of a broad range of cognitive dysfunctions associated with schizophrenia.
AB - Background: Verbal learning and memory deficits are among the most severe cognitive deficits observed in schizophrenia. We have demonstrated that such deficits do not extend to working memory for tones in a substantial number of patients even when verbal working memory is impaired. In this study we used functional magnetic resonance imaging to study the neural basis of this dissociation of auditory verbal and nonverbal working memory in individuals with schizophrenia. Methods: While undergoing functional magnetic resonance imaging, 12 schizophrenic patients and 12 matched control subjects performed auditory Word Serial Position Task and Tone Serial Position Task. Results: Both tasks produced activation in frontal cortex and temporal and parietal lobes of the cerebrum in both groups. While robust activation was observed in the left inferior frontal gyrus (areas 6, 44, and 45) in the control group during the Word Serial Position Task, activation in the patient group was much reduced in these areas and failed to show the same task- specific activation as in controls. Reduced activation in patients was not confined to the inferior frontal gyms, but also extended to a medial area during the Tone Serial Position Task and to premotor and anterior temporal lobe areas during both tasks. Conclusions: These findings support the hypothesis that abnormalities in Cortical hemodynamic response in the inferior frontal gyrus underlie the verbal working memory deficit in schizophrenia. The relationship of verbal working memory deficits to other cognitive functions suggests that abnormal functioning in the speech-related areas may reflect a critical substrate of a broad range of cognitive dysfunctions associated with schizophrenia.
UR - http://www.scopus.com/inward/record.url?scp=0031789949&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031789949&partnerID=8YFLogxK
U2 - 10.1001/archpsyc.55.12.1097
DO - 10.1001/archpsyc.55.12.1097
M3 - Article
C2 - 9862553
AN - SCOPUS:0031789949
SN - 0003-990X
VL - 55
SP - 1097
EP - 1103
JO - Archives of General Psychiatry
JF - Archives of General Psychiatry
IS - 12
ER -