Identifier: americanjournalo10ameruoft (find matches)
Title: The American journal of roentgenology, radium therapy and nuclear medicine
Year: 1906 (1900s)
Authors: American Radium Society American Roentgen Ray Society
Subjects: Radiotherapy X-rays
Publisher: Springfield, Ill. C.C. Thomas
Contributing Library: Internet Archive
Digitizing Sponsor: Internet Archive

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of the colonic lumen. up four hours after a contrast meal. Figure 28 also gives a clear idea of thegreat importance of the folds of the mucousmembrane in forming septa in the colon. In this picture, it is possible to look intothe cavity of the flexura hepatica, andget an idea of the deep, circular diaphragmwhich is here formed by the high folds ofthe mucous membrane. Figure 29 shows three transversal sec-tions of a strongly contracted flexurasigmoidea. In the upper picture a muscularseptum, originated from a transverse con-traction of the muscular coat, fills up thelower half of the lumen. But, on the other 100 Mechanism of Movement of the Mucous Membrane of the Digestive Tract hand, the folds of the mucous membrane membrane, take for granted that the fill up the cavity in such a way that it is outlines of the roentgenogram, to a great possible to misconstrue them as a trans- degree, are defined by the relief of the verse section of the jejunum. mucous membrane. For instance, the high
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Examining an ordinary roentgenogram formed ele\ ations (K) in the lumen are of the colon, as in Figure 30, we must, caused by the ridges of the mucous mem- with our knowledge of the exterior form of brane bending into the cavity, and the the colon and of the relief of the mucous smooth, rounded form of plicae semilunares Mechanism of Mo\ement of the Mucous Membrane of the Digestive Tract loi (S) is, without doubt, caused from thefolds of the mucous membrane on thecrest of the plicae. I was also in a position to obser\e anexposed surface of a mucous membranefrom the colon descendens, in a prolapseof the colon in a colostomy, and couldthereby ascertain that, in general, a richerforming of the folds appeared togetherwith an increased contraction of the mus-cular coat, but that the mucous membraneeven with very high folding could freelybe moved against the underlying muscularcoat; that a change of the folds of themucous membrane as to the number. parts has a certain tendency to form con-t

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