Diurnal Actigraphy and Stimulant Efficacy in Narcolepsy

Bruck, Dorothy, Kennedy, Gerard, Cooper, Amee and Apel, Sabine (2005) Diurnal Actigraphy and Stimulant Efficacy in Narcolepsy. Human Psychopharmacology: Clinical and Experimental, 20 (2). pp. 105-113. ISSN 0885-6222


The aim of this study was to determine whether wrist actigraphy could be used to assess the daytime effects of stimulant medication treatment in narcolepsy. Nine subjects with narcolepsy/cataplexy (medicated and unmedicated) were compared with matched control subjects. Data was collected over four days in the subjects' home. It was found that the actigraph variable of Immobility (mean duration of periods of no activity) could be used to successfully differentiate medicated and unmedicated phases, correctly classifying 89% of cases. Narcolepsy subjects differed from controls on Immobility both when medicated and unmedicated. During the unmedicated phase self-reported nap duration was longer and more naps (3.94 naps) were taken. However, the frequency of naps was still high when medicated (2.43 naps). During the unmedicated phase narcolepsy subjects reported more negative mood states (Profile of Mood States, POMS) than control subjects. However, with the exception of Vigor, scores on the individual mood factors were within the normal range. Total POMS scores were highly correlated with the actigraphic measure of Movement for both narcolepsy conditions as well as controls, with negative mood associated with less movement. It was concluded that the actigraphy variable of Immobility is sensitive enough to detect treatment effects. The relationship between mood and motor activity warrants further investigation in both clinical and non-clinical populations.

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Item type Article
URI https://vuir.vu.edu.au/id/eprint/299
DOI 10.1002/hup.666
Official URL https://onlinelibrary.wiley.com/doi/abs/10.1002/hu...
Subjects Historical > RFCD Classification > 320000 Medical and Health Sciences
Historical > FOR Classification > 1701 Psychology
Historical > Faculty/School/Research Centre/Department > School of Social Sciences and Psychology
Keywords ResPubID9395, narcolepsy, actigraphy, stimulants, motor activity, mood; diurnal
Citations in Scopus 17 - View on Scopus
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