Gluteal Region- Muscles

Question 1

Piriformis- origin

Answer 1

Anterior surface of sacrum between anterior sacral foramina

Question 2

Piriformis- insertion

Answer 2

Medial side of superior border of greater trochanter femur

Question 3

Piriformis- innveration

Answer 3

Nerve to the performs (branches from S1 and S2)

Question 4

Piriformis- function

Answer 4

Laterally rotates the extended femur at hip joint; abducts flexed femur at hip joint

Question 5

Obturator internus- origin

Answer 5

Anterolateral wall of true pelvis; deep surface of obturator membrane and surrounding bone

Question 6

Obturator internus- insertion

Answer 6

Medial side of greater trochanter of femur

Question 7

Obturator internus- innervation

Answer 7

Nerve to obturator internus (L5, S1)

Question 8

Obturator internus- function

Answer 8

Laterally rotates the extended femur at hip joint; abducts flexed femur at hip joint

Question 9

Gemellus superior- origin

Answer 9

External surface of ischial spine

Question 10

Gemellus superior- insertion

Answer 10

Along length of superior surface of the obturator internus tendon and into the medial side of greater trochanter of femur with obturator internus tendon

Question 11

Gemellus superior- innervation

Answer 11

Nerve to obturator internus (L5, S1)

Question 12

Gemellus superior- function

Answer 12

Laterally rotates the extended femur at hip joint; abducts flexed femur at hip joint

Question 13

Gemellus inferior- origin

Answer 13

Upper aspect of ischial tuberosity

Question 14

Gemellus inferior- insertion

Answer 14

Along length of superior surface of the obturator interns tendon and into the medial side of greater trochanter of femur with obturator interns tendon

Question 15

Gemellus inferior- innervation

Answer 15

Nerve to quadratus femoris (L5, S1)

Question 16

Gemellus inferior- function

Answer 16

Laterally rotates the extended femur at hip joint; abducts flexed femur at hip joint

Question 17

Quadratus femoris- origin

Answer 17

Lateral aspect of the ischium just anterior to the ischial tuberosity

Question 18

Quadratus femoris- insertion

Answer 18

Quadrate tubercle on the intertrochanteric crest of the proximal femur

Question 19

Quadratus femoris- innervation

Answer 19

Nerve to quadratus femoris (L5,S1)

Question 20

Quadratus femoris- function

Answer 20

Laterally rotates femur at hip joint

Question 21

Gluteus minimus- origin

Answer 21

External surface of ilium between inferior and anterior gluteal lines

Question 22

Gluteus minimus- insertion

Answer 22

Linear facet on the anterolateral aspect of the greater trochanter

Question 23

Gluteus minimus- innervation

Answer 23

Superior gluteal nerve (L4, L5, S1)

Question 24

Gluteus minimus- function

Answer 24

Abducts femur at hip joint; holds pelvis secure over stance leg and prevents pelvic drop on the opposite swing side during walking; medially rotates thigh

Question 25

Gluteus medius- origin

Answer 25

External surface of the ilium between anterior and posterior gluteal lines

Question 26

Gluteus medius- insertion

Answer 26

Elongate facet on the lateral surface of the greater trochanter

Question 27

Gluteus medius- innervation

Answer 27

Superior gluteal nerve (L4, L5, S1)

Question 28

Gluteus medius- function

Answer 28

Abducts femur at hip joint; holds pelvis secure over stance leg and prevents pelvic drop on the opposite swing side during walking; medially rotates thigh

Question 29

Gluteus maximus- origin

Answer 29

Fascia covering gluteus medium, external surface of ilium behind posterior gluteal line, fascia of erector spine, dorsal surface of lower sacrum, lateral margin of coccyx, external surface of sacrotuberous ligament

Question 30

Gluteus maximus- insertion

Answer 30

Posterior aspect of iliotibial tract of fascia lata and gluteal tuberosity of proximal femur

Question 31

Gluteus maximus- innveration

Answer 31

Inferior gluteal nerve (L5, S1, S2)

Question 32

Gluteus maximus- function

Answer 32

Powerful extensor of flexed femur at hip joint; lateral stabilizer of hip joint and knee joint; laterally rotates and abducts thigh

Question 33

Tensor fasciae latae- origin

Answer 33

Lateral aspect of crest of ilium between anterior superior iliac spine and tubercle of the crest

Question 34

Tensor fasciae latae- insertion

Answer 34

Iliotibial tract of fascia lata

Question 35

Tensor fasciae latae- innervation

Answer 35

Superior gluteal nerve (L4, L5, S1)

Question 36

Tensor fasciae latae- function

Answer 36

Stabilizes the knee in extension