bulbospongiosus muscle

(redirected from Bulbocavernosus muscle)
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Related to Bulbocavernosus muscle: Bulbocavernosus Reflex, musculus bulbocavernosus

bul·bo·spon·gi·o·sus mus·cle

(bŭl'bō-spŏn-jē-ō'sŭs mŭs'ĕl)
Perineal muscle; in male: origin, perineal membrane fascia on the dorsum of bulb of penis; insertion, central tendon of perineum and median raphe on free surface of the bulb; action, voluntarily constricts bulbous urethra when attempting to expel last drops after urination, or spasmodically with, and following, ejaculation to expel semen. In female: origin, dorsum of the clitoris, the corpus cavernosum, and the perineal membrane; insertion, central tendon of the perineum; action, acts as a weak sphincter of the vagina; nerve supply, pudendal (deep perineal branch).
Synonym(s): bulbocavernosus muscle, musculus bulbocavernosus, musculus bulbospongiosus, musculus ejaculator seminis, musculus sphincter vaginae, sphincter vaginae.
References in periodicals archive ?
Through the perineal incision, deeper tissues are divided and carried down until the bulbocavernosus muscle is identified.
The muscle atrophy found in the ischiocavernosus and bulbocavernosus muscles further weakens the ability to provide rigidity and strength for the penile erection (Lavoisier et al., 2014).