Muscles of the Gluteal Region- Deep Compartment

Question 1

Piriformis

Answer 1

origin: sacrum, pelvic surface
insertion: greater trochanter of femur, medial aspect
innervation: N. to piriformis
action: lateral rotation of the thigh

Question 2

Superior Gemellus

Answer 2

origin: iscium
insertion: greater trochanter, medial aspect via the obturator internus tendon
innervation: N. to obturator internus
action: lateral rotation of the thigh

Question 3

Obturator Internus

Answer 3

origin: obturator foramen and obturator membrane, internal aspet
insertion: greater trochanter of femur, medial aspect
innervation: N. to obterator internus
action: lateral rotation of the thigh

Question 4

Inferior Gemellus

Answer 4

origin: ischium
insertion: greater trochanter, medial aspect via the obturator internus tendon
innervation: N. to quadratus femoris
action: lateral rotation of the thigh

Question 5

Quadratus Femoris

Answer 5

origin: iscium
insertion: quadrate tubercle of femur
innervation: N. to quadratus femoris
action: lateral rotation of the thigh