Contributions to the physiology of the alimentary canal / by William Brinton.

  • Brinton, William, 1823-1867.
Date:
[1849]
Catalogue details

Licence: Public Domain Mark

Credit: Contributions to the physiology of the alimentary canal / by William Brinton. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    CONTRIBUTIONS TO THE PHYSIOLOGY OF THE ALIMENTARY CANAL.* LICENTIATE OF THE ROYAL COLLEGE OF PHYSICIANS: DEMONSTRATOR OF ANATOMY IN KING’S COLLEGE, LONDON. I. The anatomy of its muscular coat.—There is little necessit}r here to dilate upon the well-known structure of the muscular stratum of this organ. That there is an external plane of lon- gitudinal fibres, and an internal and transverse layer immediately beneath this, would be almost a sufficient description in the case of the simple-stomached mammals; and an alteration in the disposition of these layers relatively to the surface constitutes the chief difference at present made out in the majority of the fishes, the longitudinal layer being for the most part internal to the circular. In man and some of the higher mammalia, descriptive anato- mists have sought to distinguish a third layer, which, lying deeper than the two preceding, is directed from the right of the cardiac orifice over the large extremity of the stomach on its anterior and posterior surfaces, expanding as it descends, and returning into itself at the lower border of the viscus. But the situation of this layer—immediately beneath the ordinary circular fibres, and with difficulty, or not at all separable from them; together with its direction, transverse to the altered axis of the recurved and enlarged tube—seem to render it fairly inclusible in the category of transverse fibres; transverse, not to the appa- rent horizontal axis of the organ from the pylorus to the large exti emity, but to that real axis ot the tube which occupies its centre, and is terminated by its orifices. It deserves, however, to be remembered, that a considerable difference exists in the amount of muscular tissue present in different parts of the stomach. In about the pyloric half of the organ, its muscular coat is perceptibly thicker, and the variation, * This essay was written considerably more than a vear a°r>. II BY WILLIAM BRINTON, M.D. Londin, (Reprinted from the London Medical Gazette, 1849.) PART I. ON THE MOVEMENTS OF THE STOMACH.