Measuring leg movements during sleep using accelerometry: comparison with EMG and piezo-electric scored events

Terrill, Philip I., Leong, Matthew, Barton, Katrina, Freakley, Craig, Downey, Carl, Vanniekerk, Mark, Jorgensen, Greg and Douglas, James (2013). Measuring leg movements during sleep using accelerometry: comparison with EMG and piezo-electric scored events. In: 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013. 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013, Osaka, Japan, (6862-6865). 3-7 July 2013. doi:10.1109/EMBC.2013.6611134

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Author Terrill, Philip I.
Leong, Matthew
Barton, Katrina
Freakley, Craig
Downey, Carl
Vanniekerk, Mark
Jorgensen, Greg
Douglas, James
Title of paper Measuring leg movements during sleep using accelerometry: comparison with EMG and piezo-electric scored events
Conference name 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013
Conference location Osaka, Japan
Conference dates 3-7 July 2013
Proceedings title 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013   Check publisher's open access policy
Journal name Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS   Check publisher's open access policy
Place of Publication Piscataway, NJ, United States
Publisher IEEE
Publication Year 2013
Sub-type Fully published paper
DOI 10.1109/EMBC.2013.6611134
Open Access Status
ISBN 9781457702167
ISSN 1557-170X
Start page 6862
End page 6865
Total pages 4
Collection year 2014
Language eng
Abstract/Summary Periodic Limb Movements during Sleep (PLMS) can cause significant disturbance to sleep, resulting in daytime sleepiness and reduced quality of life. In conventional clinical practice, PLMS are measured using overnight electromyogram (EMG) of the tibialis anterior muscle, although historically they have also been measured using piezo-electric gauges placed over the muscle. However, PLMS counts (PLM index) do not correlate well with clinical symptomology. In this study, we propose that because EMG and piezo derived signals measure muscle activation rather than actual movement, they may count events with no appreciable movement of the limb and therefore no contribution to sleep disturbance. The aim of this study is thus to determine the percentage of clinically scored limb movements which are not associated with movement of the great toe measured using accelerometry. 9 participants were studied simultaneously with an overnight diagnostic polysomnogram (including EMG and piezo instrumentation of the right leg) and high temporal resolution accelerometry of the right great toe. Limb movements were scored, and peak acceleration during each scored movement was quantified. Across the participant population, 54.9% (range: 26.7-76.3) and 39.0% (range: 4.8-69.6) of limb movements scored using piezo and EMG instrumentation respectively, were not associated with toe movement measured with accelerometry. If sleep disturbance is the consequence of the limb movements, these results may explain why conventional piezo or EMG derived PLMI is poorly correlated with clinical symptomology.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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