[Results of electromyography studies of the rectosigmoid].

In 80 clinically examined patients aged 9 to 67 years the basal myoelectric activity (BER) in the rectosigmoid was registered by using an intraluminally placed hexapolar ring electrode. The frequency analysis of the sinusoidal variations showed for the patients of the normal group predominantly (14 from 18) a mean frequency of the BER of 6 to 9 cycles per minute, for the patients suffering from functional diarrhea a slow frequency of 2.5 to 5 cycles per minute, for patients with obstipation of chronic intestinal diseases no uniform frequency behaviour, and for patients with diverticulosis predominantly (5 of 6) a mean frequency of the BER of 6 to 12 cycles per minute. The individual mean frequency of the BER proved to be unaffectable by intravenous administration of pyridostigmine or hyoscin-N-butylbromide and remained constant also in control examinations after 4 to 52 weeks.