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Temporal association between sleep apnea–hypopnea and sleep bruxism events
Author(s) -
Saito Miku,
Yamaguchi Taihiko,
Mikami Saki,
Watanabe Kazuhiko,
Gotouda Akihito,
Okada Kazuki,
Hishikawa Ryuki,
Shibuya Eiji,
Lavigne Gilles
Publication year - 2014
Publication title -
journal of sleep research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 117
eISSN - 1365-2869
pISSN - 0962-1105
DOI - 10.1111/jsr.12099
Subject(s) - hypopnea , polysomnography , medicine , sleep apnea , apnea , anesthesia , apnea–hypopnea index , obstructive sleep apnea , sleep (system call) , cardiology , computer science , operating system
Summary There is some evidence suggesting that obstructive sleep apnea–hypopnea syndrome is concomitant with sleep bruxism. The aim of this study was to investigate the temporal association between sleep apnea–hypopnea events and sleep bruxism events. In an open observational study, data were gathered from 10 male subjects with confirmed obstructive sleep apnea–hypopnea syndrome and concomitant sleep bruxism. Polysomnography and audio‐video recordings were performed for 1 night in a sleep laboratory. Breathing, brain, heart and masticatory muscle activity signals were analysed to quantify sleep and sleep stage duration, and number and temporal distribution of apnea–hypopnea events and sleep bruxism events. Apnea–hypopnea events were collected within a 5‐min time window before and after sleep bruxism events, with the sleep bruxism events as the pivotal reference point. Two temporal patterns were analysed: (i) the interval between apnea–hypopnea events termination and sleep bruxism events onset, called T 1; and (ii) the interval between sleep bruxism events termination and apnea–hypopnea events onset, called T 2. Of the intervals between sleep bruxism events and the nearest apnea–hypopnea event, 80.5% were scored within 5 min. Most intervals were distributed within a period of <30 s, with peak at 0–10 s. The T 1 interval had a mean length of 33.4 s and was significantly shorter than the T 2 interval (64.0 s; P < 0.05). Significantly more sleep bruxism events were scored in association with the T 1 than the T 2 pattern ( P < 0.05). Thus, in patients with concomitant obstructive sleep apnea–hypopnea syndrome and sleep bruxism, most sleep bruxism events occurred after sleep apnea–hypopnea events, suggesting that sleep bruxism events occurring close to sleep apnea–hypopnea events is a secondary form of sleep bruxism.