Medical image of the week: sleep bruxism

Abstract

No abstract available. Article truncated at 150 words. A 42 year-old man with a past medical history of insomnia, post-traumatic stress disorder, depression and both migraine and tension headaches was referred for an overnight sleep study. He had presented to the sleep clinic with symptoms of obstructive sleep apnea. Medications included sumatriptan, amitryptiline, sertraline, and trazodone. His sleep study showed: sleep efficiency of 58.2%, apnea-hypopnea index of 33 events per hour, and arousal index of 14.5/hr. Periodic limb movement index was 29.2/hr. The time spent in the sleep stages included N1 (3.6%), N2 (72.5%), N3 (12.9%), and REM (10.9%). Figure 1 is representative of the several brief waveforms seen on his EEG and chin EMG. Sleep bruxism (SB) is a type of sleep-related movement disorder that is characterized by involuntary masticatory muscle contraction resulting in grinding and clenching of the teeth and typically associated with arousals from sleep (1,2). The American academy of sleep medicine (AASM) criteria for ...

Keywords

• bruxism
• sleep bruxism
• polysomnogram
• polysomnography
• rhythmic masticatory muscle activity
• RMMA
• teeth
• headache
• treatment
• oral appliances