Pelvic Walls

Question 1

Obturator internus O, I, A, IN

Answer 1

O- Pelvic surface of ilium, ishium and pubis + obterator membrane

I- Greater trochanter

A- lat rot of thigh, abduction

IN- nerve to obturator internus + superior gammelus (l5-S2)

Question 2

Piriformis O, I, A, IN

Answer 2

O- Ant surface of sacrum (S2-4)

I- Greater trochanter

A- Lat rot of thigh, abduction

IN- APR S1,2

Question 3

Coccygeus O, I, A, IN

Answer 3

O- Ishial spine

I- Ant surface of lower sacrum + coccyx

A- flexes coccyx

IN- APR S4,5

Question 4

Levator Ani O, I, A, IN

Answer 4

O- Body of pubis, Arch of oburator internus, base of ishal spine

I- Walls of prostate/vagina/anal canal/rectum

A- supports pelvic viscera

IN- Nerve to levator ani