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Title: Interhemispheric EEG coherence is reduced in auditory cortical regions in schizophrenia patients with auditory hallucinations
Authors: Henshall, Katherine
Sergejew, Alex
Rance, Gary
McKay, Colette
Copolov, David
Keywords: Auditory Hallucinations
Schizophrenia
Interhemispheric Connectivity
Auditory Cortex
EEG Coherence
Issue Date: Jun-2013
Publisher: Elsevier
Citation: Henshall KR, Sergejew AA, Rance G, McKay CM, Copolov DL (2013).Interhemispheric EEG coherence is reduced in auditory cortical regions in schizophrenia patients with auditory hallucinations. International Journal of Psychophysiology 89, pp. 63-71.
Abstract: Central auditory processing has been reported to be impaired in schizophrenia patientswho experience auditory hallucinations, and interhemispheric transfer in auditory circuits may be compromised. In this study, we used EEG spectral coherence to examine interhemispheric connectivity between cortical areas known to be important in the processing of auditory information. Coherence was compared across three subject groups: schizophrenia patients with a recent history of auditory hallucinations (AH), schizophrenia patientswho did not experience auditory hallucinations (nonAH), and healthy controls (HC). Subjects listened to pure tone and word stimuli while EEG was recorded continuously. Upper alpha and upper beta band coherence was calculated from six pairs of electrodes located over homologous auditory areas in the left and right cerebral hemispheres. Significant between-group differences were found on four electrode pairs (C3–C4, C5–C6, Ft7–Ft8 and Cp5–Cp6) in the upper alpha band. Relative to both the HC and nonAH groups, coherence was lower in the AH patients, consistent with the hypothesis that interhemispheric connectivity is reduced in these patients.
URI: http://repository.bionicsinstitute.org:8080/handle/123456789/95
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