Pelvis

Question 1

Obturator internus origin

Answer 1

Obturator membrane

Question 2

Piriformis origin

Answer 2

Anterior aspect of sacrum

Question 3

Levator ani origin

Answer 3

Pubis, tendinous arch, ischial spine

Question 4

Coccygeus origin

Answer 4

Ischial spine and sacrospinous ligament

Question 5

Obturator internus insertion

Answer 5

Exits lesser sciatic foramen, greater trochanter of femur

Question 6

Piriformis insertion

Answer 6

Exits greater sciatic foramen, greater trochanter of femur

Question 7

Levator ani insertion

Answer 7

Blend with fibers from opposite side

Question 8

Coccygeus insertion

Answer 8

Sacrum and coccyx

Question 9

Obturator internus innervation

Answer 9

Nerve to obturator internus (sacral plexus)

Question 10

Piriformis innervation

Answer 10

Nerve to piriformis (sacral plexus)

Question 11

Levator ani innervation

Answer 11

Nerve to levator ani (sacral plexus)

Question 12

Coccygeus innervation

Answer 12

Nerve to coccygeus (sacral plexus)

Question 13

Obturator internus action

Answer 13

Laterally rotates thigh

Question 14

Piriformis action

Answer 14

Laterally rotates thigh

Question 15

Levator ani action

Answer 15

Supports pelvic viscera, puborectalis provides anorectal angle

Question 16

Coccygeus action

Answer 16

Supports pelvic viscera