NORMAL MOTOR ACTIVITY OF THE HUMAN COLON: COMBINED RADIOTELEMETRIC MANOMETRY AND SLOW-FRAME CINEROENTGENOGRAPHY

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Abstract
Fourteen subjects with normal digestive tracts were studied by simultaneous radio-telemetric recording of colonic pressure and slow frame cineroentgenography at 30 frames per minute. The total observation time in this group was 206 minutes. Twothirds of the pressure waves recorded were associated with some form of movement of the bowel, either narrowing or shortening. Very rarely did these movements occur without an associated pressure response. Pressure waves shorter than io seconds’ duration almost uniformly were associated with no colonic activity and, therefore, are believed to originate outside the colon. No functional basis could be demonstrated for grouping pressure waves into types nor could analysis of the pressure wave indicate movement of gas or feces. The transverse colon was the most active segment. The slow-frame cineroentgenologic technique appears to offer significant advantage over pressure recording.

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