Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Muscles of the Perineum (Ex. III) Flashcards Preview

Gross Anatomy '15 Ex. III > Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Muscles of the Perineum (Ex. III) > Flashcards

Flashcards in Unit 3 - Thorax, Abdomen, Pelvis, and Perineum: Muscles of the Perineum (Ex. III) Deck (4)
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1

external anal sphincter

O: encircles anus
I: anococcygeal ligament
**runs P from perineal body to anococcygeal ligament**
Inn: pudendal n. (S2-S4)
A: closes anus

2

bulbospongiosus

O: perineal body
I: clitoris (F) or penile raphe (M)
**runs A from perineal body to clitoris (F) or penile raphe (M)
Inn: pudendal n. (S2-S4)
A: females - compresses greater vestibular gland; males - assists in erection

3

ischiocavernosus

O: ischial ramus
I: crus of clitoris or penis
Inn: pudendal n. (S2-S4)
A: maintains erection by squeezing blood into corpus cavernosum of clitoris or penis

4

superficial transverse perineal

O: ischial ramus
I: perineal body
Inn: pudendal n. (S2-S4)
A: holds pelvic organs in place; closes urethra

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