Inferior anal nerves

Inferior anal nerves

The superficial branches of the internal pudendal artery. (Inferior anal nerves visible but not labeled.)

Pudendal nerve, its course through the lesser sciatic foramen, and branches, including inferior anal at bottom right.
Details
Innervates Rectum
Identifiers
Latin Nervi anales inferiores,
nervi rectales inferiores,
nervus haemorrhoidalis inferior
TA A14.2.07.038
FMA 75469

Anatomical terms of neuroanatomy

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 hemorrhoidal vessels, 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.

Supplies

Cutaneous innervation below the pectinate line and external anal sphincter.

See also

Additional images

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)


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