Abstract
The two loops formed by the circular muscle within the pyloric segment (Figure 1) differ in their spontaneous and evoked mechanical activity: strips from the left canalis loop (or intermediate gastric sphincter) generate phasic contractions and stimulation of their nerves evokes a contraction. Strips from the right canalis loop (the distal sphincter) generate a high baseline tension and relax on nervous stimulation [1]. The mechanical end-result of nervous stimulation of the entire pyloric segment is controversial: in manometric studies the cat pylorus relaxes [2], whereas in studies of flow across the pylorus stimulation produced a decrease of flow consistent with pyloric contraction [3].
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References
Schulze-Delrieu, K. and Shirazi, S. S. (1983). Neuromuscular differentiation of the human pylorus. Gastroenterology, 84, 287–92
Behar J., Biancani P., and Zabinski, M. P. (1979). Characterization of feline gastroduodenal junction by neural and hormonal stimulation. Am. J. Physiol., 236 (11), E45–51
Edin, R. (1980). The vagal control of the pyloric motor function. A physiological and immunohistochemical study in cat and man. Acta Physiol. Scand. Suppl., 485, 1–30
Carlson, H. C., Code, C. F., and Nelson, R. A. (1966). Motor action of the canine gastroduodenal junction: a cineradiographic, pressure and electric study. Am. J. Dig. Dis., 11, 155–72
Torgersen, J. (1945). The muscular build of the stomach and duodenal bulb. Acta Radiol. Suppl., 45, 1–187
Ehrlein, H. J. (1976). Gastric motility and emptying in rabbits. In: Vantrappen, G (ed). Proceedings of the Fifth International Symposium on Gastroduodenal Motility. pp. 284–89. ( Herental, Belgium: Typoff Press )
Keet, A. D. (1957). The prepyloric contraction in the normal stomach. Acta Radiol, 48, 413–24
Williams, I. (1962). Closure of the pylorus. Br. J. Radiol., 35, 653–70
Schulze-Delrieu, K. and Wall, J. P. (1983). Determinants of flow across the isolated gastroduodenal junction of cats and rabbits. Am. J. Physiol., 245, 257–64
Apuras, S., Cooke, A. R., and Christensen, J. (1974). An inhibitory innervation at the gastroduodenal junction. J. Clin. Invest., 54, 529–34
Mir, S. S., Telford, G. L. Mason, R. G. (1979). Noncholinergic, nonadrenergic inhibitory innervation of the canine pylorus. Gastroenterology, 76, 1443–8
Biancani, P., Zabinski, M. P., and Behar, J. (1980). Mechanical characteristics of the cat pylorus. Gastroenterology, 78, 301–9
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Schulze-Delrieu, K., Wright, B., Lu, C., Shirazi, S.S. (1984). Effect of Nervous Stimulation on Pyloric Resistance and Configuration. In: Roman, C. (eds) Gastrointestinal Motility. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-9352-1_21
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DOI: https://doi.org/10.1007/978-94-010-9352-1_21
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-9354-5
Online ISBN: 978-94-010-9352-1
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