levator ani


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Related to levator ani: Levator ani syndrome, Coccygeus, Puborectalis

levator ani

one of a pair of muscles of the pelvic diaphragm that stretches across the bottom of the pelvic cavity like a hammock, supporting the pelvic organs. It is a broad thin muscle that separates into the pubococcygeus and the iliococcygeus. It originates from the ramus of the pubic bone, the spine of the ischium, and a band of fascia between the pubis and the ischium; it inserts into the last two segments of the coccyx, the anococcygeal raphe, the sphincter ani externus, and the central tendinous point of the perineum. The left and right levator ani muscles are divided ventrally but converge as a single sheet across the midline dorsally, forming most of the pelvic diaphragm. The levator ani is innervated by branches of the pudendal plexus, which contains fibers from the fourth sacral nerve. It functions to support and slightly raise the pelvic floor. The pubococcygeus draws the anus toward the pubis and constricts it. Compare coccygeus.

levator ani

A broad, thin, flat muscle, located on the pelvic sidewall, which forms the pelvic diaphragm when joining with its twin. It supports the pelvic viscera and surrounds the structures that pass through it.

Artery
Inferior gluteal artery.

Nerve
Pudendal, perineal and inferior rectal nerves, sacral spinal nerves (S3, S4).

Origin
Inner sidewall of the lesser pelvis.

Insertion
Coccyx, levator ani of opposite side, and structures that pass through it.
 
Pronunciation 
Medspeak-UK: pronounced, leh VAY tore ANN ee
Medspeak-US: pronounced, LEH vuh tore ANN ee

levator ani

A broad muscle that helps to form the floor of the pelvis.
See also: levator
References in periodicals archive ?
Differences reported in individual men's ability to correctly perform PFM exercise according to the mode of assessment--DRE and TPUS--may possibly be explained by the finding that DRE, the most commonly utilised clinical method for PFM exercise assessment, assesses the external anal sphincter puborectalis and the more posterior components of the levator ani muscle.
It is critical to inquire about pain with defecation, as bowel movements are unlikely to be associated with functional anorectal pain (such as levator ani syndrome) (2,4), and in fact may even be relieving for patients with levator muscle spasms (9).
The appearance of levator ani muscle abnormalities in magnetic resonance images after vaginal delivery.
In our case, unfortunately, the energy was deposited inside the levator ani muscle.
believed that the defect of specific repair without levator ani manipulation appears to improve sexual function [19].
16] Levator ani kasi, vaginanin giris kismi ve perine palpasyonla degerlendirilir (Sekil 2; Tablo 2).
Suena a verso de Mallarme, pero no: es un eventual calambre que odia personalmente al levator ani, el musculo que "eleva el ano" (o por lo menos su autoestima).
In the posterior compartment, level II support is provided by the direct attachment of the posterior vaginal wall laterally to the levator ani fascia.
They share the same embryological beginnings, pelvic location, aspects of innervation and passage through the levator ani.
Staging MRI scan showed large tumour protruding through anal canal involving left levator ani muscle and left seminal vesicle and enlarged bilateral pelvic lymph nodes with no evidence of liver metastasis.
The levator ani muscle, for example disappear during development of female rats, but can be maintained with testosterone administration.