Gluteal Region Muscles

Question 1

Superior gemellus attachment

Answer 1

FROM:
*external surface spine of ischium via obturator internus tendon

TO:
*greater trochanter

Question 2

Superior gemellus action

Answer 2

laterally rotates hip

Question 3

Superior gemellus innervation

Answer 3

sacral plexus (L5-S2)

Question 4

Inferior gemellus attachment

Answer 4

FROM:
*proximal ischial tuberosity via obturator internus tendon

TO:
*greater trochanter

Question 5

Inferior gemellus action

Answer 5

laterally rotates hip

Question 6

Inferior gemellus innervation

Answer 6

sacral plexus (L4-S1)

Question 7

Gluteus maximus attachment

Answer 7

FROM:
*aponeurosis of the erector spinae
*sacrum
*sacrotuberous ligament
*posterior gluteal line (innominate)

TO:
*greater trochanter
*gluteal tuberosity of the femur
*iliotibial tract

Question 8

Gluteus maximus action

Answer 8

extends and laterally rotates hip

Question 9

Gluteus maximus innervation

Answer 9

inferior gluteal nerve (L5-S2)

Question 10

Gluteus medius attachments

Answer 10

FROM:
*external iliac surface

TO:
*oblique ridge on the lateral aspect of
the greater trochanter
*gluteal aponeurosis

Question 11

Gluteus medius action

Answer 11

*abducts & medially rotates hip
*keeps the pelvis level when opposite leg is raised

Question 12

Gluteus medius innervation

Answer 12

superior gluteal nerve (L4-S1)

Question 13

Gluteus minimus attachment

Answer 13

FROM:
*external iliac surface
*margin of the greater sciatic notch

TO:
*anterolateral aspect of the greater trochanter

Question 14

Gluteus minimus action

Answer 14

abducts & medially rotates hip; and keeps the pelvis level when opposite leg is raised

Question 15

Gluteus minimus innervation

Answer 15

superior gluteal nerve (L4-S1)

Question 16

Obturator internus attachment

Answer 16

FROM:
*anterolateral wall of the pelvis
*obturator membrane

TO:
*medial surface of the greater trochanter

Question 17

Obturator internus action

Answer 17

laterally rotates hip

Question 18

Obturator internus innervation

Answer 18

nerve to the obturator internus (from sacral plexus; L5-S2)

Question 19

Piriformis attachment

Answer 19

FROM:
*anterolateral sacrum
*posterior inferior iliac spine

TO:
*upper border of the greater trochanter

Question 20

Piriformis action

Answer 20

abducts & laterally rotates hip

Question 21

Piriformis innervation

Answer 21

nerve to piriformis (S1-2)

Question 22

Quadratus femoris attachment

Answer 22

FROM:
*ischial tuberosity

TO:
*quadrate tubercle of the femur

Question 23

Quadratus femoris action

Answer 23

laterally rotates hip

Question 24

Quadratus femoris innervation

Answer 24

nerve to the quadratus femoris (from sacral plexus; L4-S1)