The internal anal sphincter can not close the anal canal completely

descriptionPublicationkeyboard_double_arrow_right Article 01 Sep 1992 English Publisher:Springer Science and Business Media LLCJournal:International Journal of Colorectal Disease, volume 7, pages 159-161 (issn: 0179-1958, eissn: 1432-1262,

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Authors: B, Lestar; F, Penninckx; H, Rigauts; R, Kerremans;

doi: 10.1007/bf00360358

pmid: 1402315

The internal anal sphincter can not close the anal canal completely

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Abstract

We determined the maximum closing capability of the internal anal sphincter muscle ring in vitro and in vivo. The internal sphincter, 4 to 6 mm thick, cannot close the anal canal hermetically, not even during maximal contraction. The blood-filled anal cushions have to fill up an intrasphincteric gap of at least 7 to 8 mm in diameter.

Related Organizations

Université Catholique de Louvain
Belgium
KU Leuven
Belgium

Keywords

Male, Magnetic Resonance Spectroscopy, Pressure, Anal Canal, Humans, Female, Middle Aged, Muscle Contraction

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