Advertisement

Relaxations of the Internal Anal Sphincter Elicited by Rectal and Extrarectal Distensions in Man

  • B. Naudy
  • D. Planche
  • B. Monges
  • J. Salducci

Abstract

The high pressure zone of the anal canal is mainly dependant at rest on the activity of the internal anal sphincter (IAS). This sphincter is reflexly relaxed when the rectal wall is distented. This phenomenon provoked by the stimulation of stretch receptors occurs in defecation or in experimental conditions after inflation of a balloon in the lumen. Such experimental distension is also effective in sigmoid (1). The present study was designed to investigate the responses obtained after distension of different parts of the lower digestive tract and to compare them to the response after rectal stimulation. It was attempted to define place of these reflex activities during defecation and among mechanisms of continence.

Keywords

Anal Canal Gastrointestinal Motility External Anal Sphincter Internal Anal Sphincter Reflex Activity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Schuster, M.M., Hendrix, T.R. and Mendeloff, A.J. (1963). The internal anal sphincter response: manometric studies on its normal physiology, neural pathways, and alterations in bowel disorders. J. of Clinical Investigation, 42, 196–207CrossRefGoogle Scholar
  2. 2.
    Monges, H., Salducci, J., Naudy, B., Ranieri, F., Gonella, J. and Bouvier, M. (1980). The electrical activity of the internal anal sphincter: a comparative study in man and in cat. In: Christensen, J. (ed). Gastrointestinal Motility. pp. 487–493. ( New York: Raven Press )Google Scholar
  3. 3.
    Salducci, J., Planche, D. and Naudy, B. (1982). Physiological role of the internal anal sphincter and the external anal sphincter during miction. In: Wienbeck, M. (ed). Motility of the Digestive Tract. pp. 513–521.( New York: Raven Press )Google Scholar
  4. 4.
    Planche, D., Salducci, J. and Naudy, B. (1982). Corrélations vésico anales durant la miction chez l’homme. J. Physiol. ( Paris ), 78, 235–239Google Scholar
  5. 5.
    Duthie, H.L. (1971). Anal continence. Gut, 12, 844–852PubMedCrossRefGoogle Scholar
  6. 6.
    Connell, A.M. (1968). Motor action of large bowel. In: Code, C.F. (ed). Handbook of Physiology. Section 6: Alimentary Canal. Volume 4: Motility. pp. 2075–2091. ( Washington D.C. American Physiological Society )Google Scholar
  7. 7.
    Scharli, A.F. and Keiseweiter, W.B. (1970). Defecation and continence: some new concepts. Dis. Col. Rect., 13, 81–107CrossRefGoogle Scholar
  8. 8.
    Christensen, J., Anuras, S. and Hauser, R.L. (1974). Migrating spike bursts and electrical slow waves in the cat colon: effect of sectioning. Gastroenterology, 66, 240–247PubMedGoogle Scholar
  9. 9.
    Haynes, W.G. and Read, N.W. (1982). Ano rectal activity in man during rectal infusion of saline: a dynamic assessment of the anal continence mechanism. J. Physiol., 330, 45–56PubMedGoogle Scholar
  10. 10.
    Connel, A.M., Frankel, H. and Guttman, L. (1963). The motility of the pelvic colon following complete lesion of spinal cord. Paraplegia, 1, 98–115.CrossRefGoogle Scholar
  11. 11.
    Gonella, J. and Gardette, B. (1974). Etude in vivo de la commande nerveuse extrinsèque parasympathique du côlon. J. Physiol. ( Paris ), 68, 393–415Google Scholar
  12. 12.
    Bouvier, M. and Gonella, J. (1981). Nervous control of the internal anal sphincter in the cat. J. Physiol., 310, 457–469PubMedGoogle Scholar

Copyright information

© MTP Press Limited 1984

Authors and Affiliations

  • B. Naudy
  • D. Planche
  • B. Monges
  • J. Salducci

There are no affiliations available

Personalised recommendations