Changes in alertness are a principal component of variance in the EEG spectrum

Minute-scale fluctuations in the normalized EEG log spectrum, when correlated with concurrent changes in level of performance on a sustained auditory detection task, showed that a single principal component of EEG spectral variance is linearly related to minute-scale changes in detection performance...

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Bibliographic Details
Published inNeuroreport Vol. 7; no. 1; p. 213
Main Authors Makeig, S, Jung, T P
Format Journal Article
LanguageEnglish
Published England 29.12.1995
Subjects
Acoustic Stimulation
Adolescent
Adult
Arousal - physiology
Auditory Perception - physiology
Electroencephalography
Female
Humans
Male
Reproducibility of Results
Online AccessGet more information
ISSN0959-4965
DOI10.1097/00001756-199512000-00051

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Summary:Minute-scale fluctuations in the normalized EEG log spectrum, when correlated with concurrent changes in level of performance on a sustained auditory detection task, showed that a single principal component of EEG spectral variance is linearly related to minute-scale changes in detection performance. The particular EEG frequencies at which this coupling is expressed are similar for most subjects under a range of task conditions, and match those recently reported from analysis of verbal self-reports during drowsiness. The one-dimensional relationship between detection performance and the EEG spectrum confirms quantitatively the intuitive assumption that minute-scale changes in behavioral alertness during drowsiness are predominantly linked to changes in global brain dynamics along a single dimension of psychophysiological arousal.
ISSN:0959-4965
DOI:10.1097/00001756-199512000-00051