Myoelectric and motor activity of the colon in normal and abnormal states

The nature of colonic motility in normal subjects is discussed. Colonic myoelectrical control is disturbed in certain diseases: slow-wave activity may be affected, or the postprandial gastrocolonic spike response may be altered. Due to these changes in contractile activity, abnormal movement of materials through the colon takes place. These phenomena are reviewed with reference to the irritable colon syndrome, idiopathic constipation, diverticular disease, diabetes mellitus, peripheral systemic sclerosis, and chronic idiopathic intestinal pseudo-obstruction. The treatment of hypermotile states requires the use of agents that diminish colonic motility. If the colon is inert, however, stimulating drugs, e.g. metoclopramide or prostigmine, are indicated.