title: Paradoxical bradycardia during REM sleep in periodic catatonia.
mesh_terms: D000513:Alpha Rhythm; D002389:Catatonia / Q000503:physiopathology; D002940:Circadian Rhythm; D004562:Electrocardiography; D004569:Electroencephalography; D004585:Electrooculography; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D010507:Periodicity; D011674:Pulse; D012119:Respiration; D012895:Sleep, REM; D013564:Sympathetic Nervous System / Q000503:physiopathology; D014851:Wakefulness