Sphincter muscle

Sphincter

  • Latin synonym: Musculus sphincter
  • Synonym: Sphincter

Definition

Muhammad A. Javaid

Sphincter muscles are circular muscles that constrict or close a passage. They are found throughout the body and may be composed of skeletal or smooth muscle, functioning under voluntary or involuntary control.

Examples include the pyloric, anal, and urethral sphincters.

References

  • Gray, H. (2016) Gray’s anatomy the anatomical basis of clinical practice. 41st edition. Edited by S. Standring. New York: Elsevier.