Muscles Of The Gluteal Region

Question 0

Insertion of the gluteus maximus

Answer 0

Most fibers end in iliotibial tract which inserts into lateral condyle of tibia
Some fibers insert on gluteal tuberosity of femur

Question 1

Origin of the gluteus maximus

Answer 1

Ilium posterior to posterior gluteal line
Dorsal surface of sacrum and coccyx
Sacrotuberous ligament

Question 2

Innervation of gluteus Maximus

Answer 2

Inferior gluteal nerve (L5, S1, S2)

Question 3

Actions of the gluteus Maximus

Answer 3

Extends thigh and assists in lateral rotation

Steadies thigh and assists in rising from sitting position

Question 4

Origin of the gluteus medius

Answer 4

External surface of ilium between anterior and posterior gluteus lines

Question 5

Insertion of gluteus medius

Answer 5

Lateral surface of greater trochanter of femur

Question 6

Innervation of gluteus medius

Answer 6

Superior gluteal nerve (L4, L5, S1)

Question 7

Actions of gluteus medius

Answer 7

Abducts and medially rotate thigh

Keep pelvis level when opposite leg is raised

Question 8

Origin of the gluteus minimus

Answer 8

External surface of ilium between anterior and inferior gluteal lines

Question 9

Insertion of the gluteus minimus

Answer 9

Anterior surface of greater trochanter of femur

Question 10

Innervation of gluteus minimus

Answer 10

Superior gluteal nerve (L4, L5, S1)

Question 11

Actions of gluteus minimus

Answer 11

Abduct and medially rotate thigh

Keep pelvis level when opposite leg is raised

Question 12

Origin of the tensor fasciae latae

Answer 12

Anterior superior iliac spine

Anterior part of iliac crest

Question 13

Insertion of the tensor fasciae latae

Answer 13

Iliotibial tract, which attaches to lateral condyle of tibia (Gerdy tubercle)

Question 14

Innervation of the tensor fasciae latae

Answer 14

Superior gluteal nerve (L4, L5, S1)

Question 15

Actions of the tensor fasciae latae

Answer 15

Flexes thigh

Question 16

Origin of the piriformis

Answer 16

Anterior surface of 2nd-4th sacral segments

Superior margin of greater sciatic notch and sacrotuberous ligament

Question 17

Insertion of the piriformis

Answer 17

Superior border of greater trochanter of femur

Question 18

Innervation of the piriformis

Answer 18

Branches of anterior rami of S1-S2

Question 19

Actions of piriformis

Answer 19

Laterally rotate extended thigh
Abduct flexed thigh
Steady femoral head and acetabulum (Stabilizes hip joint)

Question 20

Origin of the obturator internus

Answer 20

Pelvic surface of ilium and ischium

And obturator membrane

Question 21

Insertion of the obturator internus

Answer 21

Medial surface of greater trochanter (trochanteric fossa) of femur

Question 22

Innervation of the obturator internus

Answer 22

Nerve to the obturator internus (L5, S1)

Question 23

Actions of the obturator internus

Answer 23

Laterally rotate extended thigh
Abduct flexed thigh
Steady femoral head in acetabulum (stabilizes hip joint)

Question 24

Origin of the gemelli

Answer 24

Superior: ischial spine
Inferior: ischial tuberosity

Question 25

Insertion of the gemelli

Answer 25

Medial surface of the greater trochanter (trochanteric fossa) of femur

Question 26

Innervation of the gemelli

Answer 26

Superior: nerve to the obturator internus (L5, S1)
Inferior: nerve to quadratus femoris (L5, S1)

Question 27

Actions of the gemelli

Answer 27

Laterally rotate extended thigh
Abduct flexed thigh
Steady femoral head in acetabulum (stabilizes hip joint)

Question 28

Origin of the quadratus femoris

Answer 28

Lateral border of ischial tuberosity

Question 29

Insertion of the quadratus femoris

Answer 29

Quadrate tubercle on intertrochanteric crest of femur and area inferior to it

Question 30

Innervation of quadratus femoris

Answer 30

Nerve to quadratus femoris (L5, S1)

Question 31

Actions of the quadratus femoris

Answer 31

Laterally rotates thigh

Steadies femoral head in acetabulum