Differences in rem muscle activity among patients with parkinson_s disease related rem sleep behaviour disorder and patients with suspected osa. chilean experience with sinbar montages

Abstract

REM sleep behavior disorder (RBD) is a parasomnia due to an excessive muscle activity during REM sleep, expressed clinically as acting out of dreams, potentially injurious behaviors to patient or bedmate and high risk of subsequently developing alpha-synucleinopathy. RBD diagnosis is based on clinical history and confirmation of REM without atony (RWA) in polisomnography. SINBAR method quantifies pathological phasic and tonic EMG activity during REM sleep scoring records of mentalis and flexor digitorum superficialis (FDS) muscles. With this montages, validated normative values were established to define RWA in patients with idiopathic RBD and Parkinson's disease related RBD (RBD-PD). Cutoff of abnormal EMG activity were stablished comparing to healthy controls. However, in clinical practice other sleep disorders can increase electromiographic activity in REM sleep due to secondary arousals, making it difficult to analyze records. In this study we compare PSG records using SINBAR montages in patients with RBD-PD patients with suspected OSA patients.