External Sphincter
Subcutaneous part
External Sphincter
Superficial part
External Sphincter
Deep part
Internal Sphincter
Pudendal Nerve Sacral 2,3,4
Anal sphincters and nerve supply
Drawing by Dr Serag Youssif
Anal Sphincetr Damage and Foecal Incontinence

·Physical exam
·Visual inspection of anus.
·A probe may be used to examine this area for nerve damage.
·Normally touching anus causes anal sphincter to contract and the anus to pucker.

Foecal incontinence may require surgery to correct
·Rectal prolapse or
·Sphincter damage caused by childbirth. Sphincteroplasty. This procedure repairs a damaged or weakened anal sphincter that occurred during childbirth. The injured area of muscle and edges are freed from the surrounding tissue. The muscle edges are stitched back together in an overlapping fashion, strengthening the muscle and tightening the sphincter.