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A simple method for computer quantification of stage REM eye movement potentials

Published online by Cambridge University Press:  30 April 2001

XIN TAN
Affiliation:
Department of Psychiatry, University of California, Davis, USA
IAN GLENN CAMPBELL
Affiliation:
Department of Psychiatry, University of California, Davis, USA
IRWIN FEINBERG
Affiliation:
Department of Psychiatry, University of California, Davis, USA Veterans Administration Northern California Health Care System, Martinez, USA
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Abstract

We describe a simple method for computer quantification of eye movement (EM) potentials during REM sleep. This method can be applied by investigators using either period-amplitude (PA) or Fast Fourier Transform (FFT) spectral EEG analysis without special hardware or computer programming. It provides good correlations with visual ratings of EM in baseline sleep and after administration of GABAergic hypnotics. We present baseline data for both PA and FFT measures for 16 normal subjects, studied for 5 consecutive nights. Both visually rated and computer-measured EM density (EMD) showed high night-to-night correlations across baseline and drug nights and the computer measures detected the EMD suppression that is produced by GABAergic drugs. Measurement of EM in addition to stage REM provides biologically significant information and application of this simple computer method, which does not require pattern recognition algorithms or special hardware, could provide reliable data that can be compared across laboratories.

Type
Research Article
Copyright
2001 Society for Psychophysiological Research

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