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 ?
PFMT reduces SUI by strengthening the pelvic floor muscles, most importantly the levator ani muscle, and improving the support of the urethra, vagina, and rectum (Pair & Somerall, 2018; Tso & Lee, 2018).
The subsequent procedure was performed according to our previous report.[4] To consider the depth of tumor invasion: (1) in those rectal tumors not involving the ischioanal fat or levator ani muscle (T3), the dissection plane may continue close to the outside of the external anal sphincter and the inferior aspect of the levator ani muscles, leaving 1 cm of the levator ani muscles on the pelvic sidewall to keep the terminal branches of the pudendal nerve intact [Figure 2]a.
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.
In our case, unfortunately, the energy was deposited inside the levator ani muscle. This is mainly due to the inaccurate monitoring system that is ultrasound used in Ablatherm.
Extra-sphincteric: From perianal skin through levator ani muscles to the rectal wall completely outside sphincter mechanism
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.
Myotrophic activity of 19-nortestosterone and other steroids determined by modified levator ani muscle method.
Participants must learn how to identify and correctly contract the levator ani muscle without recruiting the adjacent upper abdominal, gluteal, and leg muscles (Robinson, 2000).