Unit 5 - Lower Limb: Muscles of Pelvic Diaphragm (Ex. IV)

Question 1

coccygeus

Answer 1

O: I end of sacrum
I: ischial spine
Inn: direct branches from S plexus (S4-S5)
A: supports pelvic viscera; flexes coccyx

Question 2

levator ani

Answer 2

O: puborectalis - S pubic ramus (both sides of pubic symphysis); pubococcygeus - pubis L to O of puborectalis; iliococcygeus - internal obturator fascia of levator ani (tendinous arch)
I: anococcygeal ligament; coccyx
Inn: direct branches from S plexus (S4); I anal n.
A: pelvic diaphragm - supports pelvic viscera