Internal anal sphincter: An Anatomic study

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dc.contributor.authorUz, A
dc.contributor.authorElhan, A
dc.contributor.authorErsoy, M
dc.contributor.authorTekdemir, I
dc.date.accessioned2020-06-25T17:40:12Z
dc.date.available2020-06-25T17:40:12Z
dc.date.issued2004
dc.departmentKırıkkale Üniversitesi
dc.description.abstractThe anatomy of the internal anal sphincter and surrounding structures was investigated in 24 cadavers using a surgical microscope (6-25x magnification). An understanding of the anatomy of the internal anal sphincter is helpful in avoiding complications during surgical procedures in the anorectal region. The external anal sphincter was composed of three ellipsoid rings of skeletal muscle (subcutaneous, superficial, and deep) that encircle the anal canal; in contrast, we found that the internal anal sphincter was composed of flat rings of smooth muscle bundles stacked one on top of the other, like the slats of a Venetian blind. In each anal canal, the average number of ring-like slats observed was 26.33 +/- 2.93 (range = 20-30) and each was covered by its own fascia. The smooth muscle fibers and fascia coalesced at three equidistant points around the anal canal to form three columns that extended distally into the lumen and differed in form from the other anal columns. When viewed from an anterior position, the columns were located anteriorly at the observer's right (5 o'clock position), posteriorly at the right (1 o'clock position), and laterally at the left (9 o'clock position). This heretofore unreported anatomy of the internal anal sphincter may play an important role in closing off the lumen of the anal canal and maintaining bowel continence.en_US
dc.identifier.citationclosedAccessen_US
dc.identifier.doi10.1002/ca.10160
dc.identifier.endpage20en_US
dc.identifier.issn0897-3806
dc.identifier.issue1en_US
dc.identifier.pmid14695582
dc.identifier.scopus2-s2.0-0348225169
dc.identifier.scopusqualityQ1
dc.identifier.startpage17en_US
dc.identifier.urihttps://doi.org/10.1002/ca.10160
dc.identifier.urihttps://hdl.handle.net/20.500.12587/3343
dc.identifier.volume17en_US
dc.identifier.wosWOS:000187803700004
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherWiley-Lissen_US
dc.relation.ispartofClinical Anatomy
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectanal sphincteren_US
dc.subjectbowel continenceen_US
dc.subjectanatomyen_US
dc.subjectsurgeryen_US
dc.titleInternal anal sphincter: An Anatomic studyen_US
dc.typeArticle

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