Abstract
Constipation, diarrhea, distention and colic are common complaints which may result from temporary or prolonged alterations of the normal pattern of the colon. Yet there seems to be a paucity of knowledge regarding the motor activity of the human colon and much divergence of opinion regarding its response to stimulating and antispasmodic drugs. Alvarez, 1 in summarizing our knowledge, says colon is a sluggish organ with few and slow movements. The movements of the haustra are very slow. A few times a day there are 'mass movements' which carry material usually from the transverse colon over into the sigmoid region. Much of the progress of material in it seems to be due to the pressure exerted by new material coming down from above. The concept that material from above exerts a sort of plunger effect on material below is due primarily to the inadequacy of the x-ray method for
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