PT  - JOURNAL ARTICLE
AU  - Sakuta, Manabu
AU  - Nakanishi, Takao
AU  - Toyokura, Yasuo
TI  - Anal muscle electromygrams differ in amyotrophic lateral sclerosis and Shy‐Drager syndrome
AID  - 10.1212/WNL.28.12.1289
DP  - 1978 Dec 01
TA  - Neurology
PG  - 1289--1289
VI  - 28
IP  - 12
4099  - http://n.neurology.org/content/28/12/1289.short
4100  - http://n.neurology.org/content/28/12/1289.full
SO  - Neurology1978 Dec 01; 28
AB  - Electromyography (EMG) of anal sphincter muscles was different in patients with amyotrophic lateral sclerosis (ALS) and Shy-Drager syndrome. In 30 patients with ALS, EMG of the external sphincter muscle was essentially normal, with no signs of denervation. In eight cases of Shy-Drager syndrome, however, motor unit potentials of the anal sphincter had highly polyphasic forms of long duration and high amplitude. In the Shy-Drager syndrome, there seems to be specific damage of lower motor neurons that innervate the external sphincter muscle of the anus.