Temporal associations between arousal and body/limb movement in children with suspected obstructed sleep apnoea

Lamprecht, Marnie L., Bradley, Andrew P., Williams, Gordon and Terrill, Philip I. (2015) Temporal associations between arousal and body/limb movement in children with suspected obstructed sleep apnoea. Physiological Measurement, 37 1: 115-127. doi:10.1088/0967-3334/37/1/115

Author Lamprecht, Marnie L.
Bradley, Andrew P.
Williams, Gordon
Terrill, Philip I.
Title Temporal associations between arousal and body/limb movement in children with suspected obstructed sleep apnoea
Journal name Physiological Measurement   Check publisher's open access policy
ISSN 1361-6579
Publication date 2015-12-07
Sub-type Article (original research)
DOI 10.1088/0967-3334/37/1/115
Open Access Status Not Open Access
Volume 37
Issue 1
Start page 115
End page 127
Total pages 13
Place of publication Temple Way, Bristol, United Kingdom
Publisher Institute of Physics Publishing
Collection year 2016
Language eng
Formatted abstract
The inter-relationship between arousal events and body and/or limb movements during sleep may significantly impact the performance and clinical interpretation of actigraphy. As such, the objective of this study was to quantify the temporal association between arousals and body/limb movement. From this, we aim to determine whether actigraphy can predict arousal events in children, and identify the impact of arousal-related movements on estimates of sleep/wake periods. Thirty otherwise healthy children (5?16 years, median 9 years, 21 male) with suspected sleep apnoea were studied using full polysomnography and customised raw tri-axial accelerometry measured at the left fingertip, left wrist, upper thorax, left ankle and left great toe. Raw data were synchronised to within 0.1 s of the polysomnogram. Movements were then identified using a custom algorithm. On average 67.5% of arousals were associated with wrist movement. Arousals associated with movement were longer than those without movement (mean duration: 12.2 s versus 7.9 s respectively, p??<??0.01); movements during wake and arousal were longer than other sleep movements (wrist duration: 6.26 s and 9.89 s versus 2.35 s respectively, p??<??0.01); and the movement index (movements/h) did not predict apnoea-hypopnoea index (???=???0.11). Movements associated with arousals are likely to unavoidably contribute to actigraphy's poor sensitivity for wake. However, as sleep-related movements tend to be shorter than those during wake or arousal, incorporating movement duration into the actigraphy scoring algorithm may improve sleep staging performance. Although actigraphy-based measurements cannot reliably predict all arousal events, actigraphy can likely identify longer events that may have the greatest impact on sleep quality.
Keyword Accelerometry
Paediatric sleep
Sleep disturbance
Sleep fragmentation
Sleep scoring
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Information Technology and Electrical Engineering Publications
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