Deep muscles of the Gluteal Region

Question 1

Location

Answer 1

Deep to the superficial gluteal group of muscles in the posterior aspect of the lower limb, posterior to the innominate bone

Question 2

Structure

Answer 2

5 skeletal muscles
Piriformis
Superior gemellus
Obdurator internus (tendon)
Inferior gemellus
Quadratus femoris

Question 3

Function

Answer 3

Lateral rotation of extended thigh, adducts flexed thigh.

Stability of the femoral head in the acetabulum

Question 4

Nerve supply

Answer 4

Piriformis: Nerve to piriformis
Gemellus superior and obturator internis: Nerve to obturator internus
Gemellus inferior: Superior gluteal nerve
Quadratus femoris: nerve to quadratus femoris