Gluteal Region

Question 1

Gluteus Maximus

Answer 1

Origin: outer surface of ilium, sacrum, coccyx, sacrotuberous ligament
Insertion: iliotibial tract and gluteal tuberosity of femur
Nerve: inferior gluteal nerve
Action: extends and laterally rotates hip; through iliotibial tract, it extends knee joint

Question 2

Gluteus Medius

Answer 2

Origin: outer surface of ilium
Insertion: lateral surface of greater trochanter of femur
Nerve: superior gluteal nerve
Action: abducts thigh at hip joint; tilts pelvis when walking to permit opposite leg to clear ground

Question 3

Gluteus Minimus

Answer 3

Origin: outer surface of ilium
Insertion: anterior surface of greater trochanter of femur
Nerve: superior gluteal nerve
Action: abducts thigh at hip joint; tilts pelvis when walking to permit opposite leg to clear ground

Question 4

Tensor Fascia Latae

Answer 4

Origin: iliac crest
Insertion: iliotibial tract
Nerve: superior gluteal nerve
Action: assists gluteus maximus in extending knee joint

Question 5

Piriformis

Answer 5

Origin: anterior surface of sacrum
Insertion: upper border of greater trochanter of femur
Nerve: first and second sacral nerves
Action: lateral rotator of thigh at hip joint

Question 6

Obturator Internus

Answer 6

Origin: inner surface of obturator membrane
Insertion: upper border of greater trochanter of femur
Nerve: sacral plexus
Action: lateral rotator of thigh at hip joint

Question 7

Superior Gamellus

Answer 7

Origin: spine of ischium
Insertion: upper border of greater trochanter of femur
Nerve: sacral plexus
Action: lateral rotator of thigh at hip joint

Question 8

Inferior Gamellus

Answer 8

Origin: ischial tuberosity
Insertion: upper border of greater trochanter of femur
Nerve: sacral plexus
Action: lateral rotator of thigh at hip joint

Question 9

Quadratus Femoris

Answer 9

Origin: lateral surface of ischial tuberosity
Insertion: quadrate tubercle of femur
Nerve: sacral plexus
Action: lateral rotator of thigh at hip joint