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The bulbospongiosus muscles (in older texts bulbocavernosus and, for female muscle, constrictor cunni) are a subgroup of the superficial muscles of the perineum. [1] They have a slightly different origin, insertion and function in males and females. In males, these muscles cover the bulb of the penis, while in females, they cover the vestibular ...
The anal triangle can be defined either by its vertices or its sides.. Vertices. one vertex at the coccyx bone; the two ischial tuberosities of the pelvic bone; Sides. perineal membrane (posterior border of perineal membrane forms anterior border of anal triangle)
The deep branch of the perineal nerve supplies the muscles of the perineum. [2] These include superficial transverse perineal muscle, bulbospongiosus muscle, ischiocavernosus muscle, the bulb of penis. [1] It also supplies levator ani, and the external anal sphincter. [1]
Muscles Superficial transverse perineal muscle; Ischiocavernosus muscle; Bulbospongiosus muscle; Penile crura / clitoral crura; Bulb of penis / vestibular bulbs; Urogenital diaphragm; Muscular perineal body; Superficial and deep perineal pouch; Blood vessels and lymphatics
The voluntary, pubococcygeus muscle, part of the levator ani muscle partially constricts the vaginal opening. [19] Other muscles of the urogenital triangle support the vulvar area and they include the transverse perineal muscles, the bulbospongiosus, and the ischiocavernosus muscles. [20] The bulbospongiosus muscle decreases the vaginal opening ...
The external anal sphincter (or sphincter ani externus) is an oval tube of skeletal muscle fibers. [1] Distally, it is adherent to the skin surrounding the margin of the anus. [2] It exhibits a resting state of tonical contraction [1] and also contracts during the bulbospongiosus reflex. [3] [4] [5] [6]
The bulb of penis is the proximal/posterior bulged [1] end of the (unpaired median) corpus spongiosum penis.Together with the two crura (one crus on each side of the bulb), it constitutes the root of the penis. [2]
The ischiocavernosus and bulbospongiosus muscles contract to compress the dorsal vein of the clitoris to stop drainage of the clitoris, trapping the blood. [6] The erectile tissues are composed of endothelium-lined vascular spaces in a trabecular matrix, with the endothelium -lined vascular spaces surrounded by smooth muscle capable of ...