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Erschienen in: International Urogynecology Journal 8/2007

01.08.2007 | Original Article

Physioanatomical relationship of the external anal sphincter to the bulbocavernosus muscle in the female

verfasst von: Ahmed Shafik, Ismail A. Shafik, Olfat El Sibai, Ali A. Shafik

Erschienen in: International Urogynecology Journal | Ausgabe 8/2007

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Abstract

Both external anal sphincter (EAS) and bulbocavernosus muscle (BCM) have been shown anatomically and physiologically to constitute one muscle in males. We investigated the hypothesis that the EAS and BCM have similar anatomical pattern in females. The study consisted of cadaveric dissection, electromyographic recordings and inferior rectal nerve stimulation. Bulbocavernosus reflex action was performed in 16 healthy women before and after anesthetization of the EAS and BCM. The EAS extended forward across the perineal body and became continuous with the BCM in the labia majora. Glans clitoris (GC) or inferior rectal nerve stimulation effected synchronous EAS and BCM contractions with identical action potentials. GC stimulation while the EAS or BCM was anesthetized produced neither EAS nor BCM response. Similarly, stimulation of the anesthetized GC produced no EAS or BCM response. The BCM and EAS apparently constitute a single muscle, which seems to play dual and yet synchronous roles in fecal control and sexual response.
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Metadaten
Titel
Physioanatomical relationship of the external anal sphincter to the bulbocavernosus muscle in the female
verfasst von
Ahmed Shafik
Ismail A. Shafik
Olfat El Sibai
Ali A. Shafik
Publikationsdatum
01.08.2007
Verlag
Springer-Verlag
Erschienen in
International Urogynecology Journal / Ausgabe 8/2007
Print ISSN: 0937-3462
Elektronische ISSN: 1433-3023
DOI
https://doi.org/10.1007/s00192-006-0246-z

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