The nature of gastric peristalsis / by W.B. Cannon.

  • Walter Bradford Cannon
Date:
[1911?]
Catalogue details

Licence: Public Domain Mark

Credit: The nature of gastric peristalsis / by W.B. Cannon. Source: Wellcome Collection.

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    _ Reprinted from the American Journal of Physiology. Vol. XXIX.— December 1, 1911. — No. IT. THE NATURE OF GASTRIC PERISTALSIS:! By W. B. CANNON. [From the Laboratory of Physiology in the Harvard Medical School. dae characteristic contractile activities of the stomach, so long as gastric digestion persists, are the continuously repeated peristaltic waves running over the pyloric end, and the tonic contrac- tion of the cardiac portion. In many respects the peristaltic waves of the stomach are like the antiperistaltic waves of the colon. Like the waves of the colon they follow one another in a series, without any extensive forerunning inhibition such as is seen in the dog’s small intestine. Like those of the colon, also, the waves of the stomach are not abolished by a large dose of nicotine,? which destroys the typical peristalsis of the small intestine.2 Furthermore, since the gastric waves recur with remarkably uniform rhythm, they, like the waves of the colon, must have a pulsating source. The factors ex- plaining colonic antiperistalsis may be expected, therefore, to account - for the gastric waves as well. : Tue RELATIONS OF GASTRIC ToNnus, INTRAGASTRIC PRESSURE, AND PERISTALSIS. _ As the condition for the appearance of colonic antiperistalsis an important relation has been found to exist between the internal pres- sure and the tonic state of the neuromusculature.* In the stomach 1 A preliminary account of this investigation was presented at the meeting of the American Physiological Society, December, 1910. See Proceedings, ‘This journal, 1911, xxvii, p. xii. 2 Cannon: This journal, 1909, xxiii, p. xxvii. 3 Bavriss and Startinc: Journal of physiology, 1899, xxiv, Pp. 115. 4 Cannon: This journal, 1911, xxix, p. 241.
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