The effect of paradigm on alpha frequency in schizophrenia

A W F Harris; H Bahramali; Jim Lagopoulos; W M Li; E Gordon; J J Wright

doi:10.3109/00207459808986458

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The effect of paradigm on alpha frequency in schizophrenia

Journal article

Peer reviewed

The effect of paradigm on alpha frequency in schizophrenia

A W F Harris, H Bahramali, Jim Lagopoulos, W M Li, E Gordon and J J Wright

International Journal of Neuroscience, Vol.96(1-2), pp.63-72

1998

DOI: https://doi.org/10.3109/00207459808986458

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Abstract

Neurosciences

Cognitive Sciences

Psychology

schizophrenia

quantified electroencephalography

alpha

cognition

Alterations in mean frequency and power in the alpha band of the electroencephalogram (EEG) is thought to reflect fundamental attentional and cognitive factors. This study investigated changes in the mean alpha frequency of the quantified EEG in 21 subjects with schizophrenia, compared to an equal number of age and sex matched controls. Four standard electrophysiological paradigms (eyes closed, eyes open, habituation and oddball) were used to manipulate the level of cognitive demand required of each subject. Significant differences were found both between normal and schizophrenic groups in mean alpha frequency as well as within groups between different paradigms. Whilst a consistent linear relationship between site and paradigm was observed in controls subjects (slower frontally and slower with cognitive load), this was not observed in subjects with schizophrenia. The subjects with schizophrenia showed a loss of this linear relationship and increased mean alpha frequency frontally with cognitive load.

Details

Title: The effect of paradigm on alpha frequency in schizophrenia
Authors: A W F Harris (Author) - University of Sydney
H Bahramali (Author) - University of Sydney
Jim Lagopoulos (Author) - University of Sydney
W M Li (Author) - University of Sydney
E Gordon (Author) - University of Sydney
J J Wright (Author) - Mental Health Research Institute of Victoria
Publication details: International Journal of Neuroscience, Vol.96(1-2), pp.63-72
Publisher: Taylor & Francis Ltd.
DOI: 10.3109/00207459808986458
ISSN: 0020-7454
Organisation Unit: Thompson Institute; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99450686602621
Output Type: Journal article

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