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

Question 1

external anal sphincter

Answer 1

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

Question 2

bulbospongiosus

Answer 2

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

Question 3

ischiocavernosus

Answer 3

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

Question 4

superficial transverse perineal

Answer 4

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