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Production of Artificial SphinctersAblation of the Longitudinal Layer of the Intestine
William R. Schiller, MD;
Liberato J. A. DiDio, MD, DSc, PhD;
Marion C. Anderson, MD
AMA Arch Surg. 1967;95(3):436-442.
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UNTIL recently, little was known about the mechanisms responsible for gastrointestinal motility. At the turn of the century, Bayliss and Starling1 described peristalsis as a wave of relaxation followed immediately by a wave of contraction which moved the bolus of food along the digestive tract. Although this phenomenon can be demonstrated to occur in the intestinal tract of some lower animals, present evidence suggests that comparable peristaltic waves occur only in the esophagus of man. In the small intestine of man peristalsis consists of a coordinated wave of activity in which contraction of the outer longitudinal muscle is 90° out of phase with that of the inner circular muscle. The circular muscle narrows the lumen while the longitudinal muscle opens the lumen and shortens the segment of the bowel involved.
Gastrointestinal motor activity has been characterized as either propulsive, as previously described, or pendular. Pendular movements, also known as
. . . [Full Text PDF of this Article]
Author Affiliations
Chicago
From the departments of surgery and anatomy, Northwestern University Medical School, Chicago.
Footnotes
Submitted for publication March 15, 1967.
Read before the 24th annual meeting of the Central Surgical Association, Pittsburgh, Feb 23, 1967.
Reprint requests to 303 E Chicago Ave, Chicago 60611 (Dr. Anderson).
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