title: Laryngeal electromyography in multiple system atrophy with autonomic failure.
abstract: In five patients with multiple system atrophy, electromyographic studies using a new surface electrode technique, showed unequivocal evidence of denervation of the posterior crico-arytenoid muscle, and in three of them, of the interarytenoid muscle or crico-pharyngeal sphincter. By comparison, only minor electromyographic abnormalities were found in one-third of patients with other extra-pyramidal syndromes, though in two cases, the abnormalities were of a different kind from those found in multiple system atrophy.
mesh_terms: D000368:Aged; D001342:Autonomic Nervous System Diseases / Q000503:physiopathology*; D004576:Electromyography / Q000379:methods*; D005260:Female; D006801:Humans; D007821:Laryngeal Muscles / Q000503:physiopathology*; D007823:Laryngeal Nerves / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000503:physiopathology*; D010300:Parkinson Disease / Q000503:physiopathology; D012791:Shy-Drager Syndrome / Q000503:physiopathology*