Crotch (perineum) is the bottom of the pelvis, which is formed by a group of striated muscle and fascia, covering the pelvic opening the exit.
In the isolated urogenital perineum (front) region (regio urogenitalis), which includes the vulva, urethra, urogenital diaphragm muscles, the vagina (in women) and the anal region (regio analis), which contains the perineal division of the rectum to the anus and the external sphincter (sphincter) anus and pelvic diaphragm.
Go to the pelvic floor muscles are:
- Muscle lifting the anus (m. levator ani), is the foundation of the pelvic diaphragm, pelvic floor lifts, making it elastic. Starting point is the muscle on the inner surfaces of the pelvic bones, where it goes down on the bias to the median line, where the interwoven fibers with the same name opposite side of the muscle surrounding the anus. Muscle is closely connected with the external anal sphincter, and for women of her beams involved in the formation of constrictor vagina;
- Deep transverse perineal muscle (m. transversus perinei profundus), forming the urogenital diaphragm. Start point of the muscle is located on the buttocks, where it is sent to the median line and combined with the same name opposite side of the muscle;
- Superficial transverse perineal muscle (m. transversus perinei superficialis), casual, located at the posterior edge of the urogenital diaphragm, the muscle is closely linked with the same name, in part, is woven into the bulbospongiosus muscle and spongy in the muscle, squeezing the anus;
- Muscle, compressing the urethra (m. sphincter urethrae), steam room, surrounded by webby part of the urethra in men with prostate knits for women - with the vagina;
- Ischio-cavernous muscle (m. ischiocavernosus) and bulbospongiosus muscle, spongy (m. bulbospongiosus), cutting, contribute to erectile dysfunction, promote urine or semen. In men, these muscles cover the root of the penis, in women, they are much less developed, and terminate on the clitoris or around the entrance to the vagina .
|In Fig. 193.
A - male;
B - Women's:
1 - bulbospongiosus muscle, spongy;
2 - superficial fascia of perineum;
3 - ischio-cavernous muscle;
4 - superficial transverse perineal muscle;
5 - external anal sphincter;
6 - muscle lifting the anus;
7 - gluteus maximus
Pelvic fascia (fascia pelvis) covers the pelvic floor muscles at the top. It is a direct continuation of the intra-abdominal fascia and the fascia is made up of parietal and visceral pelvic fascia covering the pelvic organs. Bottom is covered crotch superficial fascia of the perineum (fascia superficialis perinei) and lower fascia pelvic floor.
a., aa. — arteria, arteriae (artery, the artery)
lig., ligg. — ligamentum, ligamenta (ligament, the ligaments)
m., mm. — musculus, musculi (muscle, the muscle)
n., nn. — nervus, nervi (nerve, the nerve)
r., rr. — ramus, rami (branch)
s. — seu (or)
v., vv. — vena, venae (vienna)