Relationship between Power Spectra of the Awake EEG and Psychomotor Activity Patterns Measured by Short-Term ActigraphyWinkler D. · Pjrek E. · Pezawas L. · Presslich O. · Tauscher J. · Kasper S.
aDepartment of General Psychiatry, University Hospital for Psychiatry, Vienna, Austria; bClinical Brain Disorders Branch, National Institute of Mental Health, Bethesda, Md., USA
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.
Dietmar Winkler, MD
Department of General Psychiatry, University Hospital for Psychiatry
Währinger Gürtel 18–20
AT–1090 Vienna (Austria)
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Number of Print Pages : 6
Number of Figures : 0, Number of Tables : 1, Number of References : 44
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Official Journal of the International Pharmaco-EEG Society (IPEG)
Vol. 48, No. 4, Year 2003 (Cover Date: Released December 2003)
Journal Editor: P. Netter, Giessen; J. Mendlewicz, Brussels; B. Saletu, Vienna
ISSN: 0302–282X (print), 1423–0224 (Online)
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