Gluteal Muscles

Question 1

Origin: Gluteus Maximus

Answer 1

ilium posterior to posterior gluteal line, dorsal surface of sacrum and coccyx, and sacrotuberous ligament

Question 2

Origin: Gluteus Medius

Answer 2

External surface of ilium

Question 3

Origin: Gluteus minimus

Answer 3

external surface of ilium

Question 4

Origin: Piriformis

Answer 4

Anterior surface of sacrum and sacrotuberous ligament

Question 5

Origin: Obturator internus

Answer 5

Pelvic surface of obturator membrane and surrounding bones

Question 6

Origin: Gemelli, superior and inferior

Answer 6

Superior: ischial spine
Inferior: ischial tuberosity

Question 7

Origin: Quadratus femoris

Answer 7

Lateral border of ischial tuberosity

Question 8

Insertion: Gluteus Maximus

Answer 8

Most fibers end in iliotibial tract that inserts into lateral condyle of tibia; some fibers insert on gluteal tuberosity of femur

Question 9

Insertion: Gluteus medius

Answer 9

Lateral surface of greater trochanter

Question 10

Insertion: Gluteus minimus

Answer 10

Anterior surface of greater trochanter

Question 11

Insertion: Piriformis

Answer 11

Superior border of greater trochanter

Question 12

Insertion: Obturator internus

Answer 12

Medial aspect of greater trochanter

Question 13

Insertion: Gemelli, superior and inferior

Answer 13

Medial aspect of greater trochanter

Question 14

Insertion: Quadratus femoris

Answer 14

Quadrate tubercle on intertrochanteric crest of femur

Question 15

Innervation: Gluteus maximus

Answer 15

inferior gluteal nerve (L5-S2)

Question 16

Innervation: Gluteus medius

Answer 16

Superior gluteal nerve (L4-L5 and S1)

Question 17

Innervation: Gluteus minimus

Answer 17

superior gluteal nerve (L4-L5 and S1)

Question 18

Innervation: Piriformis

Answer 18

Branches of ventral rami S1-S2

Question 19

Innervation: Obturator internus

Answer 19

Nerve to obturator internus (L5-S1)

Question 20

Innervation: Gemelli, superior and inferior

Answer 20

Superior: same nerve supply as obturator internus
Inferior: same nerve suppply as quadratus femoris

Question 21

Innervation: Quadratus femoris

Answer 21

Nerve to quadratus femoris (L5-S1)

Question 22

Main Actions: Gluteus maximus

Answer 22

extends thigh at the hip and assists in its lateral rotation; steadies thigh and assists in raising trunk from flexed position

Question 23

Main Actions: Gluteus medius

Answer 23

Abducts and medially rotates thigh at hip; steadies pelvis on limb when opposite limb is raised

Question 24

Main Actions: Gluteus minimus

Answer 24

Abducts and medially thigh at hip; steadies pelvis on limb when opposite limb is raised

Question 25

Main Actions: Piriformis

Answer 25

Laterally rotates extended thigh at hip and abducts flexed thigh at hip; steadies femoral head in acetabulum

Question 26

Main Actions: Obturator internus

Answer 26

Laterally rotates extended thigh at hip and abducts flexed thigh at hip; steadies femoral head in acetabulum

Question 27

Main Actions: Gemelli, superior and inferior

Answer 27

Laterally rotate extended thigh at the hip and abduct flexed thigh at the hip; steady femoral head in acetabulum

Question 28

Main Actions: Quadratus Femoris

Answer 28

Laterally rotates thigh at hip; steadies femoral head in acetabulum