puborectalis muscle

(redirected from Puborectalis)

pu·bo·rec·ta·lis mus·cle

(pyū'bō-rek-tā'lis mŭs'ĕl)
The medial part of the musculus levator ani (pubococcygeus muscle) that passes from the body of the pubis around the anus to form a muscular sling at the level of the anorectal junction; it contracts to increase the perineal flexure during a peristalsis to maintain fecal continence and relaxes to allow defecation.
Synonym(s): musculus puborectalis [TA] , puborectal muscle.

puborectalis muscle

Pelvic muscle, part of levator ani. Origin: back surface of pubis. Insertion: joins other levator ani muscles forming a bowl shaped diaphragm, encircles anal canal, and attaches to sacrum and coccyx. Nerve: inferior rectal and sacral (S4). Action: supports pelvis, holds anal canal at right angle to rectum.
See also: muscle


Christian W., German anatomist, 1831-1892.
Braune canal - the birth canal formed by the uterine cavity, dilated cervix, vagina, and vulva.
Braune muscle - Synonym(s): puborectalis muscle
Braune valve - a fold of mucous membrane at the junction of the esophagus with the stomach.
References in periodicals archive ?
Pain inside the pelvis, especially on the pelvic sidewall (obturator or puborectalis complex) usually is related to mechanical tension.
11] highlighted anatomical differences involving the levator ani and puborectalis muscles between African-American and white American women, while Huang et al.
As illustrated in Figure 1, the "surgical anal canal" extends cephalocaudally from the level of the pelvic floor (the anorectal ring or the junction of the puborectalis portion of the levator ani muscle with the external anal sphincter) to the proximal marginof the anal verge.
A line that extends from the lowermost aspect of the symphysis pubis to the puborectalis muscle forms the puborectalis hiatus.
Among the causes of constipation are paradoxical puborectalis contraction, rectocele, and pelvic floor failure, including rectal prolapse and rectoanal intussusception, but sometimes the cause can be as simple as a lack of fiber and water in the diet, she said.
In the rectum, straining, together with inappropriate puborectalis muscle contractions and the transition from loosely adherent rectal mucosa to more adherent anal mucosa, produces internal prolapse of the anterior rectal wall.
Investigators administered bilateral injections totalling 40 units of Botox in one of three different dilutions into the puborectalis and pubococcygeus muscles of patients under conscious sedation.
The rectum is defined clinically as the distal large intestine commencing opposite the sacral promontory and ending at the anorectal ring, which corresponds to the proximal border of the puborectalis muscle palpable on digital rectal examination (1) (Figure 2).
Portions of the pubococcygeus and puborectalis muscles insert into the apex of the PB.
The external anal sphincter and puborectalis muscles reveal their tone as the patient squeezes.
It also can show spastic puborectalis or rectal intussusception.