. The anatomical record. Anatomy; Anatomy. Figs. 9 to 12 These figures are explanations, based on the spiral architec- tonics of the intestinal muscles of Bayliss and Starling's graphic record (Journal of Physiology, 1899, vol. 24, p. 107). They state that there is synchronous activity at the same spot and at the same time of the two coats (fig. 4, Journal of Physiology, 1899, vol. 24, p. 105). Their record was produced by two entero- graphs placed at right angles to each other. One records the shortening between c and d. This represents contraction of the inner coat. The other records shorten
. The anatomical record. Anatomy; Anatomy. Figs. 9 to 12 These figures are explanations, based on the spiral architec- tonics of the intestinal muscles of Bayliss and Starling's graphic record (Journal of Physiology, 1899, vol. 24, p. 107). They state that there is synchronous activity at the same spot and at the same time of the two coats (fig. 4, Journal of Physiology, 1899, vol. 24, p. 105). Their record was produced by two entero- graphs placed at right angles to each other. One records the shortening between c and d. This represents contraction of the inner coat. The other records shortening between a and b. This represents contraction of the outer coat. The arrows are directed caudad to the right of the observer. Fig. 9 This figure represents the intestinal musculature in tonic equilibrium. Fig. 10 This figure represents a peristaltic wave produced by a stimulus. The stimulus may be a pinch, induction current, or a balloon inserted into the lumen as used by Bayliss and Starling. The inhibition of the contraction in the inner coat is due to the elongation caused by the contraction of the outer coat. The so-called inhibition is found in the zone of caudal dilation. Their records prove that the outer coat causes a widening and continues contracting. Each contraction of the outer coat corresponds to the rhythmic contraction of the cephalic constriction as it progresses caudad. Fig. 11 The cephalic constriction as schematized has passed the upper point a. Fig. 12 This figure represents the cephalic constriction at the points c and d. There is now produced a record of contraction of the inner coat. At the same time a record is produced of contraction of the outer coat. This is due to the point a approximating b. The record shows, therefore, simultaneous contrac- tions, but this does not prove that the effects of the contractions occur at simul- taneous points. The resultant of contraction of the outer coat is distal to that of the inner coat in the same unit of time
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
