Abstract:
CONTEXT:Mandibular movements (MM) are considered as reliable reporters of respiratory effort (RE) during sleep and sleep disordered breathing (SDB), but MM accuracy has never been validated against the gold standard diaphragmatic electromyography (EMG-d). OBJECTIVES:To assess the degree of agreement between MM and EMG-d signals during different sleep stages and abnormal respiratory events. METHODS:Twenty-five consecutive adult patients with SDB were studied by polysomnography (PSG) that also included multipair esophageal diaphragm electromyography and a magnetometer to record MM. EMG-d activity (microvolt) and MM (millimeter) amplitudes were extracted by envelope processing. Agreement between signals amplitudes was evaluated by mixed linear regression and cross-correlation function and in segments of PSG including event-free and SDB periods. RESULTS:The average total sleep time was 370 ± 18 min and the apnea hypopnea index was 24.8 ± 5.2 events/h. MM and EMG-d amplitudes were significantly cross-correlated: median r (95% CI): 0.67 (0.23-0.96). A mixed linear model showed that for each 10 µV of increase in EMG-d activity, MM amplitude increased by 0.28 mm. The variations in MM amplitudes (median range: 0.11-0.84 mm) between normal breathing, respiratory effort-related arousal, obstructive, mixed, and central apnea periods closely corresponded to those observed with EMG-d activity (median range: 2.11-8.23 µV). CONCLUSION:MM amplitudes change proportionally to diaphragmatic EMG activity and accurately identify variations of RE during normal sleep and SDB.
journal_name
Front Neuroljournal_title
Frontiers in neurologyauthors
Martinot JB,Le-Dong NN,Cuthbert V,Denison S,Silkoff PE,Guénard H,Gozal D,Pepin JL,Borel JCdoi
10.3389/fneur.2017.00353subject
Has Abstractpub_date
2017-07-21 00:00:00pages
353issn
1664-2295journal_volume
8pub_type
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