sphincter

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Related to sphincter control: sphincter muscle

sphincter

Anatomy a ring of muscle surrounding the opening of a hollow organ or body and contracting to close it

Sphincter

 

a ringlike muscle that constricts to close a natural orifice such as the oral or anal opening, or to narrow the passage from one part of a hollow tubular organ to another, for example, from the stomach and bile duct to the duodenum and from the bladder to the urethra. The sphincter is always in a tonic state. The orbicular muscle of the iris is a sphincter. Some sphincters consist of striated muscle and others of smooth muscle innervated by the autonomic nervous system.

sphincter

[′sfiŋk·tər]
(anatomy)
A muscle that surrounds and functions to close an orifice.
References in periodicals archive ?
21) evaluated the functional status of 41 healthy children aged between 24-120 months using WeeFIM and found that independence in activities increased with advanced age, except sphincter control.
The FIM assesses the following areas: self-care, sphincter control, transfers, locomotion, communication, and social cognition.
While the exact mechanism of action has not been identified, it is hypothesized that the Solesta injections may narrow the anal canal and allow for better sphincter control.

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