Muscles Of The Gluteal Region

Question 1

Piriformis

Answer 1

Compartment - deep compartment of the gluteal region
Origin - anterior surface of the sacrum
Insertion - greater trochanter of femur
Action - lateral rotation and abduction of the hip joint
Innervation - nerve to piriformis

Question 2

Obturator Internus

Answer 2

Compartment - deep compartment of the gluteal region
Origin - pubis + ischium at the obturator foramen, and the medial surface of the obturator membrane
Insertion - greater trochanter of femur
Action - lateral rotation and abduction of the hip joint
Innervation - nerve to obturator internus

Question 3

Superior Gemelli

Answer 3

Compartment - deep compartment of the thigh
Origin - gluteal surface of the ischial spine
Insertion - obturator internus tendon
Action - lateral rotation and abduction of the hip joint
Innervation - nerve to obturator internus

Question 4

Inferior Gemelli

Answer 4

Compartment - deep compartment of gluteal region
Origin - ischial tuberosity
Insertion - obturator internus tendon
Action - lateral rotation and abduction of hip joint
Innervation - nerve to quadratus femoris

Question 5

Quadratus Femoris

Answer 5

Compartment - deep compartment of thigh 
Origin - ischial tuberosity 
Insertion - intertrochanteric crest of femur 
Action - lateral rotation of hip joint 
Innervation - nerve to quadratus femoris

Question 6

Gluteus Minimus

Answer 6

Compartment - superficial compartment of the gluteal region
Origin - gluteal surface of ilium between inferior and anterior/middle gluteal line
Insertion - anterior side of greater trochanter
Action - abduction of the lower limb and medial rotation of the hip
Innervation - superior gluteal nerve

Question 7

Gluteus Medius

Answer 7

Compartment - superficial compartment of the gluteal region
Origin - gluteal surface of the ilium between the anterior/middle and posterior gluteal line
Insertion - lateral surface of greater trochanter
Action - abduction of lower limb, medial rotation of the hip
Innervation - superior gluteal nerve

Question 8

Tensor Fascia Lata

Answer 8

Compartment - superficial compartment of the gluteal region
Origin - anterior iliac crest on the anterior iliac spine
Insertion - iliotibial tract
Action - abduction of the lower limb and medial rotation
Innervation - superior gluteal nerve

Question 9

Gluteus Maximus

Answer 9

Compartment - superficial compartment of the gluteal region
Origin - lower surface of sacrum, posterior surface of ilium behind the posterior gluteal line, and lateral surface of coccyx
Insertion - iliotibial tract + gluteal tuberosity of the femur
Action - extension of the thigh, lateral rotation
Innervation - inferior gluteal nerve