levator ani muscle


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Related to levator ani muscle: Coccygeus muscle, Perineal body

le·va·tor a·ni mus·cle

(lě-vā'tŏr ā'nī mŭs'ĕl)
Formed by pubococcygeus and iliococcygeus muscles; origin, posterior body of pubis, tendinous arch of the levator ani, and spine of ischium; insertion, anococcygeal ligament, sides of the lower part of the sacrum and of coccyx; action, resists prolapsing forces and draws the anus upward following defecation; supports the pelvic viscera; nerve supply, nerve to levator ani (fourth sacral spinal nerve).
Synonym(s): musculus levator ani [TA] .

levator ani muscle

The set of pelvic floor muscles, which include the iliococcygeus, levator prostatae or vaginal sphincter, pubococcygeus, and puborectalis muscles. Origins: insides of pelvic bones (pubis, arcus tendinaeus, ischial spine, and sacrospinous ligament). Insertions: perineal body, coccyx, anococcygeal ligament, lower sacrum. Nerve: perineal of spinal S4, pudendal. Action: supports pelvic viscera, contributes to urethral, vaginal, and anal sphincter actions.
See also: muscle
References in periodicals archive ?
The appearance of levator ani muscle abnormalities in magnetic resonance images after vaginal delivery.
Myogenic changes of the levator ani muscle in premenopausal women: the impact of vaginal delivery and age.
Quantitative study of the effects of denervation and castration on the levator ani muscle of the rat.
Testosterone-induced masculinization of the rat levator ani muscle during puberty.
It is conceivable that one could detect levator ani muscle contraction because of its effect on the ischiorectal fat pad.
suggested that the chronic pain may be related to the activation of the inflammatory cytokines at the mesh site, the coccygectomy, the damage to the pudendal nerve, the wider excision of the levator ani muscles and ischiorectal fossal fat, and the suturing of the mesh itself close to the pelvic wall.
The repair of the perineal hernia by suturing coccygeus muscles with levator ani muscle was observed to be successful.
The PN travels into the perineal region via the lesser sciatic foramen, where it lies underneath the plane of the levator ani muscle.
There was also levator ani muscle tenderness at the four and nine o'clock position within the vagina, greater on the left suggestive of levator ani spasm.
Levator ani muscle is the most important muscle in the pelvic floor and represents a critical component of pelvic organ support.