Muscles of Gluteal Region

Question 0

Gluteus Medius - Origin

Answer 0

• external surface of ilium between anterior and posterior gluteal lines

Question 1

Gluteus Maximus - Origin

Answer 1

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

Question 2

Gluteus Medius - Innervation

Answer 2

• Superior Gluteal Nerve (L4, L5, S1)

Question 3

Gluteus Maximus - Innervation

Answer 3

• Inferior Gluteal Nerve (L5, S1, S2)

Question 4

Gluteus Maximus - Actions

Answer 4

• extends thigh and assists in lateral rotation

- steadies thigh and assists in rising from seated position

Question 5

Gluteus Maximus - Insertion

Answer 5

• most fibers end in iliotibial tract, which inserts into lateral condyle of tibia
• some fibers insert on gluteal tuberosity of femur

Question 6

Gluteus Medius - Insertion

Answer 6

• lateral surface of greater trochanter

Question 7

Gluteus Minimus - Origin

Answer 7

• external surface of ilium between anterior and inferior gluteal lines

Question 8

Gluteus Minimus - Insertion

Answer 8

• anterior surface of greater trochanter

Question 9

Gluteus Minimus - Innervation

Answer 9

• Superior Gluteal Nerve (L4, L5, S1)

Question 10

Gluteus Minimus - Action

Answer 10

• adducts and medially rotates thigh

- keep pelvis level when opposite leg is raised

Question 11

Tensor fasciae latae - Origin

Answer 11

• ASIS

- anterior part of iliac crest

Question 12

Tensor fasciae latae - Insertion

Answer 12

• iliotibial tract attaching to lateral condyle of tibia

Question 13

Tensor fasciae latae - Innervation

Answer 13

Superior gluteal n. (L4,L5, S1)

Question 14

Tensor fasciae latae - Action

Answer 14

Flexes thigh

Question 15

Piriformis - Origin

Answer 15

• anterior surface of 2nd - 4th sacral segments

- superior margin of greater sciatic notch and sacrotuberous ligament

Question 16

Piriformis - Insertion

Answer 16

Superior border of greater trochanter

Question 17

Piriformis - Innervation

Answer 17

Branches of anterior rami of S1,S2

Question 18

Piriformis - Action

Answer 18

• Laterally rotates extended thigh
• Abducts flexed thigh
• Steadies hip joint

Question 19

Obtruator Internus - Origin

Answer 19

Obtruator membrane

Question 20

Obtruator Internus - Insertion

Answer 20

Medial surface of greater trochanter

Question 21

Obtruator Internus - Innervation

Answer 21

Nerve to obtruator internus (L5,S1)

Question 22

Gluteus Medius - Action

Answer 22

• adduct and medially rotates thigh

- keeps pelvis level when opposite leg is raised

Question 23

Gemelli Superior - Origin

Answer 23

Ischial spine

Question 24

Obtruator Internus - Action

Answer 24

- Laterally rotates extended thigh - Abducts flexed thigh - Stabilizes hip joint

Question 25

Gemelli Superior - Innervation

Answer 25

Nerve to obtruator Internus (L5,S1)

Question 26

Gemelli Superior - Action

Answer 26

- Laterally rotates extended thigh - Abducts flexed thigh - Stabilizes hip joint

Question 27

Gemelli Inferior - Origin

Answer 27

Ischial tuberosity

Question 28

Gemelli Inferior - Insertion

Answer 28

Medial surface of greater trochanter

Question 29

Gemelli Inferior - Innervation

Answer 29

Nerve to quadratus femoris (L5, S1)

Question 30

Gemelli Superior - Insertion

Answer 30

Medial surface of greater trochanter

Question 31

Quadratus Femoris - Origin

Answer 31

Lateral border of ischial tuberosity

Question 32

Quadratus Femoris - Insertion

Answer 32

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

Question 33

Gemelli Inferior - Action

Answer 33

- Laterally rotates extended thigh - Abducts flexed thigh - Stabilizes hip joint

Question 34

Quadratus Femoris - Action

Answer 34

- Laterally rotates thigh | - Stabilizes hip joint

Question 35

Quadratus Femoris - Innervation

Answer 35

Nerve to quadratus femoris (L5,S1)