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Relationship between Power Spectra of the Awake EEG and Psychomotor Activity Patterns Measured by Short-Term Actigraphy

Authors
  • Winkler, Dietmar
  • Pjrek, Edda
  • Pezawas, Lukas
  • Presslich, Otto
  • Tauscher, Johannes
  • Kasper, Siegfried
Type
Published Article
Journal
Neuropsychobiology
Publisher
S. Karger AG
Publication Date
Dec 19, 2003
Volume
48
Issue
4
Pages
176–181
Identifiers
DOI: 10.1159/000074634
PMID: 14673214
Source
Karger
Keywords
License
Green
External links

Abstract

Actigraphy is a quantitative method for the measurement of motor activity. In the present study, actigraphy was used to examine psychomotor correlates of brain activity. Thirty-four psychiatric patients (17 males and 17 females) with different diagnoses participated in this investigation. Directly after EEG recording, motor activity was measured with a wrist actimeter for 15 min in patients in the sitting position. The EEG was quantified by spectrum analysis, and the power spectra as well as other EEG-derived variables were correlated with actigraphic parameters. Occipital and temporoparietal β1 power was statistically significantly higher in patients with higher activity scores and lower in those with a high density of sleep (SB) or wake bouts (WB). A high density of SB or WB was also positively correlated with higher mean α power. Immobile phases measured by actigraphy were positively associated with occipital α and with frontal/frontopolar δ activity, preferentially on the side of the left hemisphere. Our results, while preliminary, suggest that short-term actigraphy may be apt to reflect central nervous system arousal.

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