Report of an inferior rectal nerve variant arising from the S3 ventral ramus.

Authors

Graham Dupont
Joe Iwanaga
Rod J Oskouian, Swedish Neuroscience Institute, Swedish Medical Center, Seattle, Washington, USAFollow
R Shane Tubbs

Document Type

Article

Publication Date

3-1-2019

Publication Title

Anat Cell Biol

Keywords

Anal canal; Inferior rectal nerve variations; Perineum; Pudendal nerve block

Abstract

In surgical approaches to the perineum in general and anal region specifically, considering the possible variations of the inferior rectal nerve is important for the surgeon. Normally, the inferior rectal nerve originates as a branch of the pudendal nerve. However, during routine dissection, a variant of the inferior rectal nerve was found where it arose directly from the third sacral nerve ventral ramus (S3). Many cases have described the inferior rectal nerve arising independently from the sacral plexus, most commonly from the fourth sacral nerve root (S4); however, few cases have reported the inferior rectal nerve arising from S3. Herein, we describe a variant of the inferior rectal nerve in which the nerve arises independently from the sacral plexus.

Clinical Institute

Neurosciences (Brain & Spine)

Department

Neurosciences

Department

Pathology & Laboratory Medicine

Recommended Citation

Dupont, Graham; Iwanaga, Joe; Oskouian, Rod J; and Tubbs, R Shane, "Report of an inferior rectal nerve variant arising from the S3 ventral ramus." (2019). Articles, Abstracts, and Reports. 1470.
https://digitalcommons.providence.org/publications/1470