Abstract
The split-screen, video polysomnogram (PSG) of a 23-year-old woman with a history notable for many stressors and frequent nightmares associated with screaming arousals showed significant bruxism (nocturnal tooth grinding) with rhythmic masticatory muscle activity (RMMA) recognized as a pattern of rhythmic muscle artifact throughout multiple channels of the study (Video 1) [1]. The conventional PSG sweep speed of 10 mm/s (or 30 s/page) relatively compressed the data making electroencephalographic (EEG) sleep staging impossible (Fig. 1a). By digitally expanding the EEG through utilization of the faster sweep speed of a conventional EEG study (30 mm/s, or10 seconds/page), we were able to correlate the muscle activity of bruxism with a specific sleep state (Fig. 1b).
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The PSG shows bruxism with RMMA recognized as a pattern of rhythmic muscle artifact throughout multiple channels associated with loud, unpleasant crunching/squeaking sounds. (MP4 12565 kb)
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Dyken, M.E., Dyken, M.R. (2023). Sleep-Related Bruxism. In: Thomas, R.J., Bhat, S., Chokroverty, S. (eds) Atlas of Sleep Medicine. Springer, Cham. https://doi.org/10.1007/978-3-031-34625-5_51
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DOI: https://doi.org/10.1007/978-3-031-34625-5_51
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