. The anatomical record. Anatomy; Anatomy. STRUCTURE AND FUNCTION OF SMALL INTESTINE 199 By now stimulating the intestinal tube as before, the typical cephalic constriction and caudal dilatation of the peristaltic wave are started down the tube in the normal direction caudad. In figure 5 the peristalsis is seen a few millimeters from the ex-. Fig. 4 Diagram of gut from which the outer muscular coat was exsected from a to b. Fig. 5 Diagram of peristaltic wave bordering the area in which the outer muscle layer is absent. Note especially that the caudal dilatation is shortened and totally lacking
. The anatomical record. Anatomy; Anatomy. STRUCTURE AND FUNCTION OF SMALL INTESTINE 199 By now stimulating the intestinal tube as before, the typical cephalic constriction and caudal dilatation of the peristaltic wave are started down the tube in the normal direction caudad. In figure 5 the peristalsis is seen a few millimeters from the ex-. Fig. 4 Diagram of gut from which the outer muscular coat was exsected from a to b. Fig. 5 Diagram of peristaltic wave bordering the area in which the outer muscle layer is absent. Note especially that the caudal dilatation is shortened and totally lacking over the area in which the outer muscle layer was exsected. Fig. 6 The cephalic constriction of the peristaltic wave borders the upper aspect of the area in which the outer muscle layer is absent. From a" to b" no dilatation is seen. This gap acts as an effective barrier to the propagation of the peristaltic wave if it extends 30 to 40 mm. in length. A greatly diminished wave was seen once to extend caudad in which the gap was only 5 mm. Such a gap ordinarily acts as a barrier if no fluid content is within the lumen of the intes- tine. At a" rhythmic contractions may occur for some time before the gut mus- culature comes to tonic equilibrium at this point. That the two muscle layers are reciprocal elongators as peristalsis advances is evident. sected zone with a foreshortened caudal dilatation. As soon as the constriction reaches the edge of the operated region (fig. 6) no caudal dilatation is detected. The outer coat is absent at the gap and coincident with the absence of continuity of the outer coat there is an absence of the typical caudal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bardeen, Charles Russell, 1871-1935, ed; Boyden, Edward A. (Edward Allen), 1886-1976; Breme
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
