Gluteal Muscles

Question 1

Origin of Gluteus Maximus

Answer 1

Posterior ilium, posterior superior iliac crest, posterior inferior aspect of sacrum and coccyx, and sacrotuberous ligament

Question 2

Insertion of Gluteus Maximus

Answer 2

fascia lata at the iliotibial band; also into the gluteal tuberosity

Question 3

Action of Gluteus Maximus

Answer 3

Major extensor of hip joint, assists in laterally rotating the thigh; abducts thigh

Question 4

Innervation of Gluteus Maximus

Answer 4

Inferior gluteal nerve (L5,S1,S2)

Question 5

Origin of Gluteus Medius

Answer 5

Dorsal ilium inferior to iliac crest

Question 6

Insertion of Gluteus Medius

Answer 6

Lateral and superior surfaces of greater trochanter

Question 7

Action of Gluteus Medius

Answer 7

Major abductor of thigh; anterior fibres help to rotate hip medially; posterior fibres help to rotate hip laterally

Question 8

Innervation of Gluteus Medius and Minimus

Answer 8

Superior gluteal nerve (L4, L5, S1)

Question 9

Origin of Gluteus Minimus

Answer 9

Dorsal ilium between inferior and anterior gluteal lines.

Question 10

Insertion of Gluteus Minimus

Answer 10

Anterior surface of greater trochanter

Question 11

Action of Gluteus Minimus

Answer 11

Abducts and medially rotates the hip joint

Question 12

Origin of Piriformis

Answer 12

Lateral Sacrum

Question 13

Insertion of Piriformis

Answer 13

Superior greater trochanter

Question 14

Action of Piriformis

Answer 14

Lateral rotator of the hip joint

Question 15

Innervation of Piriformis

Answer 15

Nerve to Piriformis nerve (S1, S2)

Question 16

Origin of Obturator Internus

Answer 16

Posterior surface of obturator membrane and posterior bony margins of obturator foramen

Question 17

Insertion of Obturator Internus, Superior Gemellus and Inferior Gemellus

Answer 17

Medial surface of greater trochanter

Question 18

Action of Obturator Internus, Superior Gemellus, Inferior Gemellus and Quadratus Femoris

Answer 18

Rotates the thigh laterally; also helps abduct the flexed thigh

Question 19

Innervation of Obturator Internus and Superior Gemellus

Answer 19

Nerve to the obturator internus (L5,S1)

Question 20

Innervation of Inferior Gemellus and Quadratus Femoris

Answer 20

Nerve to quadratus femoris (L5,S1)

Question 21

Origin of Superior Gemellus

Answer 21

Ischial Spine

Question 22

Origin of Inferior Gemellus

Answer 22

Superior ischial tuberosity

Question 23

Origin of Quadratus Femoris

Answer 23

Lateral ischium

Question 24

Insertion of Quadratus Femoris

Answer 24

Quadrate tubercle and intertrochanteric crest