Catathrenia and Bruxism
Catathrenia (ie, sleep-related groaning) consists of sleep-related respiratory noises that occur predominantly during REM sleep. The typical respiratory noise in a patient with catathrenia has an expiratory quality and responds well to therapy with continuous positive airway pressure, which suggests that catathrenia may result from upper airway restriction. Between events, the patient in this video also exhibits bruxism (ie, grinding of the teeth), which is a movement disorder of sleep and may also represent an oral parafunctional activity.
Soňa Nevšímalová, MD, DSc
CONTINUUM: Lifelong Learning in Neurology. 19(1, Sleep Disorders):170-184, February 2013