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1 From the Departments of Pharmacology and Roentgenology, University of Michigan Medical School, Ann Arbor, Michigan
Fluoroscopic visualization and X-ray films have shown that the P-waves of kymographic records of intestinal motility are caused by peristalsis. Most of the other waves on such a record are due to localized activity. The increase in tone following moderate doses of morphine usually does not involve all the musculature over a balloon to the same extent. Rhythmic contractions are not identical with segmenting contractions but are the result of activity involving the musculature over nearly the entire length of the balloon.
Submitted on December 5, 1935