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perineal membrane
The perineal membrane is an anatomical term for a fibrous membrane in the perineum. The term "inferior fascia of urogenital diaphragm", used in older texts, is considered equivalent to the perineal membrane.
It is the superior border of the superficial perineal pouch, and the inferior border of the deep perineal pouch.
==Shape and boundaries==
It is triangular in shape, and about 4 cm. in depth.
Its apex is directed forward, and is separated from the arcuate pubic ligament by an oval opening for the transmission of the deep dorsal vein of the penis.
Its lateral margins are attached on either side to the inferior rami of the pubis and ischium, above the crus penis.
Its base is directed toward the rectum, and connected to the central tendinous point of the perineum.The base is fused with both the pelvic fascia and Colle's fascia.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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