PT - JOURNAL ARTICLE AU - G M Guindi AU - R Bannister AU - W P Gibson AU - J K Payne TI - Laryngeal electromyography in multiple system atrophy with autonomic failure. AID - 10.1136/jnnp.44.1.49 DP - 1981 Jan 01 TA - Journal of Neurology, Neurosurgery & Psychiatry PG - 49--53 VI - 44 IP - 1 4099 - http://jnnp.bmj.com/content/44/1/49.short 4100 - http://jnnp.bmj.com/content/44/1/49.full SO - J Neurol Neurosurg Psychiatry1981 Jan 01; 44 AB - 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.