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Heart Rate Changes Associated With Rhythmic Masticatory Muscle Activities And Limb Movements In Sleep Bruxers: Preliminary Findings

CRANIO-THE JOURNAL OF CRANIOMANDIBULAR & SLEEP PRACTICE(2021)

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Abstract
Objective: To investigate the relationship of rhythmic masticatory muscle activities (RMMAs) and limb movements (LMs) with heart rate (HR) acceleration.Methods: The amplitude and duration of HR increases, the time to reach peak HR associated with RMMAs/LMs during sleep, duration of movement events, and their relationships with cortical arousal levels were determined in 9 sleep bruxers and 10 normal controls.Results: A total of 48.15% and 49.44% HR increased before the onset of RMMAs/LMs in the sleep bruxers and controls, respectively. All of the parameters of HR increases were significantly different between the sleep bruxers and the controls (p < 0.05-0.001) and between different cortical arousal levels (p < 0.01), and the duration of RMMAs/LMs was positively correlated with the parameters (Sleep bruxers: r(2) = 0.18-0.88, p < 0.0001; Controls: r(2) = 0.16-0.78, p < 0.0001).Discussion: These data suggest the HR increases are associated with the movement events and changes in cortical arousal levels in the sleep bruxers and controls.
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Key words
Sleep bruxism, jaw movements, limb movements, heart rate, cortical arousals
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