Gluteal Muscles - ABD and Rotation

Question 1

Gluteus maximus m. - origin

Answer 1

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

Question 2

Gluteus maximus m. - insertion

Answer 2

• IT Tract, which inserts into lat. condyle of tibia

- some fibers insert on gluteal tuberosity

Question 3

Gluteus maximus m. - nerve

Answer 3

Inferior gluteal n. (L5, S1, S2)

Question 4

Gluteus maximus m. - blood supply

Answer 4

Inferior gluteal a.

Question 5

Gluteus maximus m. - action

Answer 5

• extends thigh (esp. from flexed position)
• assists in ER
• steadies thigh
• assist in rising from sitting

Question 6

Gluteus medius m. - origin

Answer 6

external surface of ilium b/t A&P gluteal lines

Question 7

Gluteus medius m. - insertion

Answer 7

Lateral surface of greater trochanter of femur

Question 8

Gluteus medius m. - nerve

Answer 8

Superior gluteal n. (L5, S1)

Question 9

Gluteus medius m. - blood supply

Answer 9

Superior gluteal a.

Question 10

Gluteus medius m., Gluteus minimus m., Tensor fasciae latae m. - action

Answer 10

• abduct thigh
• IR thigh
• keep pelvis level when ipsilateral limb is weight-bearing and advance opposite/ unsupported side during swing phase

Question 11

Gluteus minimus m. - origin

Answer 11

external surface of ilium b/t anterior and inferior gluteal lines

Question 12

Gluteus minimus m. - insertion

Answer 12

anterior surface of greater trochanter of femur

Question 13

Gluteus minimus m. - nerve

Answer 13

Superior gluteal n. (L5, S1)

Question 14

Gluteus minimus m. - blood supply

Answer 14

Superior gluteal a.

Question 15

Tensor fasciae latae m. - origin

Answer 15

• ASIS

- anterior part of iliac crest

Question 16

Tensor fasciae latae m. - insertion

Answer 16

IT Tract, which attaches to lateral condyle of tibia

Question 17

Tensor fasciae latae m. - nerve

Answer 17

Superior gluteal n. (L5, S1)

Question 18

Tensor fasciae latae m. - blood supply

Answer 18

• ascending branch of lateral circumflex femoral a.

- superior gluteal a.

Question 19

Piriformis m. - origin

Answer 19

• Anterior surface of sacrum

- sacrotuberous l.

Question 20

Piriformis m. - insertion

Answer 20

superior border of greater trochanter of femur

Question 21

Piriformis m. - nerve

Answer 21

Branches of anterior rami of S1, S2

Question 22

Piriformis m. - blood supply

Answer 22

• Superior gluteal a.
• inferior gluteal a.
• internal pudendal a.

Question 23

Piriformis m., Obturator internus m., Superior and Inferior gemmelli m. - action

Answer 23

• ER extended thigh
• Abduct flexed thigh
• Steady femoral head in acetabulum

Question 24

Obturator internus m. - origin

Answer 24

pelvic surface of obturator membrane and surrounding bones

Question 25

Obturator internus m. - insertion

Answer 25

medial surface of greater trochanter (trochanteric fossa) of femur

Question 26

Obturator internus m. - nerve

Answer 26

Nerve to obturator internus (L5, S1)

Question 27

Obturator internus m. - blood supply

Answer 27

- internal pudendal a. | - obturator a.

Question 28

Superior gemellus m. - origin

Answer 28

Ischial spine

Question 29

Superior gemellus m. - nerve

Answer 29

Nerve to obturator internus (L5, S1)

Question 30

Superior and Inferior gemelli m. - insertion

Answer 30

Medial surface of greater trochanter (trochanteric fossa) of femur

Question 31

Inferior gemellus m. - origin

Answer 31

Ischial tuberosity

Question 32

Inferior gemellus m. - nerve

Answer 32

Nerve to quadratus femoris (L5, S1)

Question 33

Superior gemellus m. - blood supply

Answer 33

- internal pudendal a. | - inferior gluteal a.

Question 34

Inferior gemellus m. - blood supply

Answer 34

Medial circumflex femoral a.

Question 35

Quadratus femoris m. - origin

Answer 35

Lateral border of ischial tuberosity

Question 36

Quadratus femoris m. - insertion

Answer 36

Quadrate tubercle on intertrochanteric crest of femur and inferior area

Question 37

Quadratus femoris m. - nerve

Answer 37

Nerve to quadratus femoris (L5, S1)

Question 38

Quadratus femoris m. - blood supply

Answer 38

- Medial circumflex femoral a. | - inferior gluteal a.

Question 39

Quadratus femoris m. - action

Answer 39

- ER thigh | - Steadies femoral head in acetabulum