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October 4, 1924


JAMA. 1924;83(14):1082. doi:10.1001/jama.1924.02660140040015

The physiology of the alimentary tract has witnessed extensive developments in the last quarter century, the additions to our knowledge being due in large measure to innovations in the methods of experimentation. The roentgen rays have been applied with much success to the observation of gastro-intestinal movements in the intact animal and in man; and the information thus gained has been used to supplement the facts elicited by older methods of study involving graphic records of the exposed alimentary canal. The outcome has been to establish at least two types of contractile activities in the intestine. One of these is localized and rather rhythmic, serving to mix the contents with the digestive secretions and spread them out again over the absorbing surfaces; the other type of movement consists of larger waves, which usually run from one end of the bowel to the other and serve to transport the contained residues

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