perineum

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perineum

 [per″ĭ-ne´um]
the pelvic floor and associated structures occupying the pelvic outlet, bounded anteriorly by the pubic symphysis, laterally by the ischial tuberosities, and posteriorly by the coccyx. During childbirth the perineum may be torn, resulting in possible damage to the urinary meatus and anal sphincter. To avoid a perineal tear, the obstetrician often cuts the perineum just before delivery and sutures the incision after delivery of the infant and the placenta. This procedure is called an episiotomy. Surgical repair of an episiotomy or of a torn or lacerated perineum is called perineorrhaphy.

per·i·ne·um

, pl.

per·i·ne·a

(per'i-nē'ŭm, -nē'ă), [TA]
1. Surface area between the thighs extending from the coccyx to the pubis that includes the anus posteriorly and the external genitalia anteriorly.
2. The compartment inferior to the pelvic diaphragm bounded peripherally by the osseofibrous structures comprising the pelvic outlet the surface of which is sense 1.
3. External surface of the central tendon of the perineum, lying between the vulva and the anus in the female and the scrotum and the anus in the male.
[L. fr. G. perineon, perinaion]

perineum

/peri·ne·um/ (-ne´um)
1. the pelvic floor and associated structures occupying the pelvic outlet, bounded anteriorly by the pubic symphysis, laterally by the ischial tuberosities, and posteriorly by the coccyx.
2. the region between the thighs, bounded in the male by the scrotum and anus and in the female by the vulva and anus.

perineum

(pĕr′ə-nē′əm)
n. pl. peri·nea (-nē′ə)
1. The portion of the body in the pelvis occupied by urogenital passages and the rectum, bounded in front by the pubic arch, in the back by the coccyx, and laterally by part of the hipbone.
2. The region between the scrotum and the anus in males, and between the posterior vulva junction and the anus in females.

per′i·ne′al (-nē′əl) adj.

perineum

[per′inē′əm]
Etymology: Gk, perineos
the part of the body situated dorsal to the pubic arch and the arcuate ligaments, ventral to the tip of the coccyx, and lateral to the inferior rami of the pubis and the ischium and the sacrotuberous ligaments. The perineum supports and surrounds the distal parts of the urogenital and GI tracts of the body. In the female the central fibrous perineal body is larger than in the male; the bulbospongiosus, which is a sphincter around the orifice of the vagina and a cover over the clitoris, does not exist in the male perineum. In men and women the muscles are innervated by the perineal branch of the pudendal nerve. perineal, adj.

perineum

The mucocutaneous tissue between the posterior scrotum or vagina and the anal sphincter.

per·i·ne·um

(per'i-nē'ŭm, -ă) [TA]
1. The area between the thighs extending from the coccyx to the pubis and lying below the pelvic diaphragm.
2. The external surface of the central tendon of the perineum, lying between the vulva and the anus in the female and the scrotum and the anus in the male.
[L. fr. G. perineon, perinaion]

perineum

(per?i-ne'um) [Gr. perinaion]
1. The structures occupying the pelvic outlet and constituting the pelvic floor.
Enlarge picture
PERINEUM
2. The external region between the vulva and anus in a female or between the scrotum and anus in a male. It is made up of skin, muscle, and fasciae. The muscles of the perineum are the anterior portion of the intact levator ani muscle and the transverse perineal muscle. See: illustration; perineal body

perineum

That part of the floor of the PELVIS that lies between the tops of the thighs. In the male, the perineum lies between the anus and the scrotum. In the female, it includes the external genitalia.

Perineum

The area between the opening of the vagina and the anus in a woman, or the area between the scrotum and the anus in a man.

perineum

the region between the tail and the ischiatic arch, especially the region between the anus and genital organs made up of the pelvic diaphragm and associated structures occupying the pelvic outlet, bounded ventrally by the pelvic symphysis, laterally by the ischial tuberosities, and dorsally by the coccygeal vertebrae. During parturition the perineum may be torn, resulting in possible damage to the urinary meatus and anal sphincter. To avoid a perineal laceration the veterinarian may cut the perineum just before delivery and suture the incision after delivery. See also episiotomy, perineorrhaphy.
References in periodicals archive ?
The alteration of the anogenital distance also can be correlated with hormonal disturbances.
In male rodents, exposure to phthalates has been linked to a shortened anogenital distance, the span from the center of the anus to the base of the penis.
The study results, which will appear in an upcoming Environmental Health Perspectives, show a statistically strong association between a short anogenital distance and high exposures to four phthalates.
The differences in anogenital distance in female offspring in response to maternal CAPs exposure were more dramatic than those observed in their age-matched male counterparts because AGD was significantly (p = 0.
In girls, subtle changes in anogenital distance appeared to be associated with phthalate residues in the mothers' urine.
Anogenital distance and penile length in infants with hypospadias or cryptorchidism: comparison with normative data.
We observed no significant associations or consistent dose--response associations between prenatal TCS exposure and anogenital distance in the girls (although our calculations were based on fewer observations than in the boys) (Table 4).
Anogenital distance as a measure of human male fertility.
The relationship between anogenital distance and reproductive hormone levels in adult men.
Past human studies have linked early-life phthalate exposures with altered neurological development, childhood allergies, and decreased anogenital distance in baby boys (a marker of feminization).
Therefore, in the present study we examined the relationship between first-trimester urinary metabolite concentrations of DEP, DBP, DEHP, and BBzP as well as DiNP in relation to anogenital distance in boys at 21 months of age.