title: Facial muscle tonus during REM and NREM sleep.
mesh_terms: D000293:Adolescent; D000328:Adult; D004576:Electromyography / Q000295:instrumentation; D005152:Facial Muscles / Q000502:physiology*; D005260:Female; D006801:Humans; D009129:Muscle Tonus; D012894:Sleep Stages; D012895:Sleep, REM