Envelope analysis of electromyogram in rem sleep behavior disorder patients
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2017Metadata
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Espinoza D., Gabriela
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Envelope analysis of electromyogram in rem sleep behavior disorder patients
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Abstract
Clinical manifestations of REM Behavior Disorder (BRD)
include REM sleep without atonia (RWA) characterized by maintenance of
muscle tonus associated to intense and frequent phasic motor events during
REM sleep episodes. The diagnosis of RBD includes the enaction of dreams,
i.e. the patient displays complex vocal and motor behaviors during REM
sleep thatmay reflect dream content and the polisomnographic recording of
RWA. There is a growing interest in RWA, as it has been considered a prodromal
manifestation of neurodegenerative alpha-synucleinopathies such
as Parkinson's disease. Current clinical diagnostic procedures include the
visual inspection of polysomnographic record and categorization of electromyographic
(EMG) events. Automated (computer based) strategies has
been proposed to assist in EMG scoring to maximize diagnostic accuracy.
Here we apply envelope analysis to EMG records obtained in healthy subjects
and RBD patients. Envelope analysis give qualitative information
regarding the underlying mechanism of signal generation.
The mathematical properties of CVE distribution may help to obtain an
unbiased scoring of electromyographic (EMG) events during sleep. The
numeric value acquired by CVE is a reporter of the temporal structure of
recorded elements, where phasic or pulsatile events adopt high CVE values
and can be unequivocally discriminated from non pulsatile intervals. The
amplitude of the envelope (AE) of EMG is directly related to muscle tonus.
We propose that characterization CVE and AE may help to assist in identify
RWA.
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Guillermo Puelma Foundation
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Abstracts / Sleep Medicine 40 (2017) e90-e91
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