Deep gluteal muscles

Question 1

what are the 5 deep muscles of the glutes

Answer 1

Piriformis 
Obturator internus
Superior gemellus
Inferior gemellus 
Quadratus femoris

Question 2

Piriformis

PA
DA
N
A

Answer 2

ant surface of sacrum and sacrotuberous lig.

superior border of the greater trochanter of the femur

nerve to piriformis

lat rotates, extended thigh, abducts flexed thigh, stabilises femoral head in acetabulum.

Question 3

Obturator internus

PA
DA
N
A

Answer 3

exits the pelvic cavity through the lesser sciatic foramen.

internal surface of the pelvis, obturator membrane and surrounding bones.

medial surface of the greater trochanter (trochanteric fossa)

nerve to the obturator internus

laterally rotates extended thigh, abducts flexed thigh, stabilises femoral head in acetabulum.

Question 4

Gemellus Superior and Inferior

PA
DA
N
A

Answer 4

combine with the obturator internus, they are considered the triceps of the hip.

Superior - ischial spine
Inferior - ischial tuberosity

medial surface of the greater trochanter (trochanteric fossa)

Superior - Nerve to obturator internus
Inferior - Nerve to quadartus femoris

lat rotates extended thigh, abducts flexed thigh, stabilises femoral head in acetabulum.

Question 5

Quadratus Femoris

PA
DA
N
A

Answer 5

lateral border of the ischial tuberosity

quadrate tubercle on the intertrochanteric crest of the femur.

Nerve to quadratus femoris

Laterally rotates thigh, stabilses femoral head in the acetabulum