Nerves that connect to the anus

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Inferior anal nerves

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Neurogenic Bowel | Cedars-Sinai

The Inferior rectal nerves inferior anal nerves , inferior hemorrhoidal nerve usually branch from the pudendal nerve but occasionally arises directly from the sacral plexus ; they cross the ischiorectal fossa along with the inferior rectal artery and veins , toward the anal canal and the lower end of the rectum , and is distributed to the Sphincter ani externus external anal sphincter, EAS and to the integument skin around the anus. Branches of this nerve communicate with the perineal branch of the posterior femoral cutaneous and with the posterior scrotal nerves at the forepart of the perineum. Cutaneous innervation below the pectinate line and external anal sphincter. From Wikipedia, the free encyclopedia.
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Neurogenic Bowel

Nerves serving the internal anal sphincter NIAS have been described as the lower rectal branches of the pelvic autonomic nerve plexus. However, their topographical anatomy and fiber components have remained unclear. Using histological sections from ten elderly donated cadavers, we investigated the topographical anatomy and composite fibers of the NIAS using immunohistochemistry for S protein, neuronal nitric oxide synthase nNOS , vasoactive intestinal polypeptide VIP and tyrosine hydroxylase TH.
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Sign up. Illustrated anatomical parts with images from e-Anatomy and descriptions of anatomical structures. The Inferior anal nerves Inferior rectal nerves; inferior hemorrhoidal nerve; n.
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