While 60% of study participants had intact external and internal anal sphincters seen on endoanal ultrasound, and 30% had an isolated external anal sphincter defect

The external anal sphincter (or sphincter ani externus) is a flat plane of muscular fibers, elliptical in shape and intimately adherent to the skin surrounding the

sphincter [sfingk´ter] a circular muscle that constricts a passage or closes a natural orifice. When relaxed, a sphincter allows materials to pass through the opening.

Anal sphincters. The external anal sphincters and internal anal But we can voluntarily squeeze the external anal sphincter, which is the ring of muscle lower down

External anal sphincter muscle – definition of External anal sphincter muscle by The Free Dictionary

Anal manometry, measures the strength of the anal sphincter muscle. External resources. American Academy of Family Physicians (AAFP) 11400 Tomahawk Creek Parkway

Anal stenosis means that the anal opening is too small or does not The external anal sphincter is a It is wrapped around the internal anal sphincter muscle.

The anal sphincter is a group of muscles at the end of the rectum that surround the anus and control the release of stool, thereby maintaining continence.

A second sphincter, the external anal sphincter, is composed of striated muscle and is divided into three parts known as the subcutaneous, superficial,

Medical definition of anal sphincter: either of two sphincters controlling the closing of the anus:—