Medical Definition of Musculus sphincter vaginae

1. In the male: origin, the perineal membrane fascia on the dorsum of the bulb of the penis; insertion, central tendon of the perineum and the median raphe on the free surface of the bulb; action, constricts bulbous urethra when attempting to expel last drops following urination, or spasmodically with ejaculation to expel semen. In the female: origin, the 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; when developed, is a part of "cross-member musculature" of pelvic floor which resists prolapse of pelvic viscera. Nerve supply, pudendal (deep perineal branch). Synonym: musculus bulbospongiosus, musculus bulbocavernosus, musculus ejaculator seminis, musculus sphincter vaginae, sphincter vaginae. (05 Mar 2000)

Lexicographical Neighbors of Musculus Sphincter Vaginae

musculus skeleti
musculus soleus
musculus sphenosalpingostaphylinus
musculus sphincter
musculus sphincter ampullae hepatopancreaticae
musculus sphincter ani
musculus sphincter ani externus
musculus sphincter ani internus
musculus sphincter ductus choledochi
musculus sphincter ductus pancreatici
musculus sphincter pupillae
musculus sphincter pylori
musculus spinalis
musculus spinalis capitis
musculus spinalis cervicis
musculus spinalis colli
musculus spinalis dorsi
musculus spinalis thoracis
musculus splenius capitis
musculus splenius cervicis
musculus splenius colli
musculus stapedius
musculus sternalis
musculus sternochondroscapularis
musculus sternoclavicularis

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