obturator internus

Origin

• pelvic surface of obturator membrane & margin of obturator foramen

Insertion

• passes out of pelvis through lesser sciatic foramen, turns 90 degrees & inserts into the medial surface of the greater trochanter (femur)

Action

rotates thigh laterally

Innervation

nerve to the obturator internus (sacral plexus)

More general terms

• skeletal muscle (voluntary muscle)