LOWER LIMB MUSCLES: GLUTEAL REGION

Question 1

Which nerves innervate the gluteus maximus?

Answer 1

inferior gluteal nerve

Question 2

Which blood vessels supply blood to the gluteus maximus?

Answer 2

inferior and superior gluteal artery
(branches of the internal iliac artery)

Question 3

Where is the origin of the gluteus maximus?

Answer 3

posterior gluteal line, dorsal sacroilial ligament, dorsal surface of sacrum and sacotuberous ligament

Question 4

Where is the insertion of the gluteus maximus?

Answer 4

gluteal tuberosity of femur and iliotibial tract

Question 5

What is the function of the gluteus maximus?

Answer 5

extends and laterally rotates thigh at hip joint; through
iliotibial tract it extends knee joint

Question 6

Which nerves innervate the gluteus medius?

Answer 6

superior gluteal nerve

Question 7

Which blood vessels supply blood to the gluteus medius?

Answer 7

superior gluteal artery

Question 8

Where is the origin of the gluteus medius?

Answer 8

lateral surface of ilium from iliac crest and posterior gluteal line superior to anterior gluteal line

Question 9

Where is the insertion of the gluteus medius?

Answer 9

lateral surface of greater trochanter

Question 10

What is the function of the gluteus medius?

Answer 10

abducts thigh and helps in medial rotation of thigh

Question 11

Which nerve innervates the gluteus medius?

Answer 11

superior gluteal nerve

Question 12

Which blood vessels supply the gluteus medius?

Answer 12

superior gluteal artery

Question 13

Where is the origin of the gluteus medius?

Answer 13

lateral surface of ilium between anterior and inferior gluteal lines

Question 14

Where is the insertion of the gluteus medius?

Answer 14

anterior border of greater trochanter

Question 15

What is the function of the gluteus medius?

Answer 15

abducts thigh and helps in medial rotation

Question 16

Which nerves innervates the inferior gamellus?

Answer 16

nerve to quadratus femoris
and gamellus inferior

Question 17

Which blood vessels supply the inferior gamellus?

Answer 17

inferior gluteal artery

Question 18

Where is the origin of the inferior gamellus?

Answer 18

superior border of ischial tuberosity

Question 19

Where is the insertion of the inferior gamellus?

Answer 19

tendon of obturator internus then via this tendon to the surface of the greater trochanter

Question 20

What is the function of the inferior gamellus?

Answer 20

lateral rotation of the thigh

Question 21

Which nerves innervate the obturator internus?

Answer 21

sacral plexus (nerve to obturator internus and superior gamellus)

Question 22

Which blood vessels supply the obturator internus?

Answer 22

internal pudendal and superior
gluteal artery

Question 23

Where is the origin of the obturator internus?

Answer 23

margin of pelvic surface of obturator foramen and membrane

Question 24

Where is the insertion of obturator internus?

Answer 24

medial surface of greater trochanter

Question 25

What is the function of the obturator internus?

Answer 25

lateral rotator of thigh, abducts thigh when limb is flexed

Question 26

Which nerves innervate the piriformis?

Answer 26

1st and 2nd sacral nerve (nerve to piriformis)

Question 27

Which blood vessels supply the piriformis?

Answer 27

internal pudendal artery and superior and inferior gluteal artery

Question 28

Where is the origin of the piriformis?

Answer 28

anterior surface of sacrum and margin of greater sciatic foramen and sacrotuberous ligament

Question 29

Where is the insertion of the piriformis?

Answer 29

superior border of greater trochanter

Question 30

What is the function of the piriformis?

Answer 30

abducts and laterally rotates thigh

Question 31

Which nerves innervate the quadratus femoris?

Answer 31

nerve to quadratus femoris and gamellus inferior

Question 32

Which blood vessels supply the quadratus femoris?

Answer 32

medial femoral circumflex artery

Question 33

Where is the origin of the quadratus femoris?

Answer 33

lateral margin of ischial tuberosity

Question 34

Where is the insertion of the quadratus femoris?

Answer 34

posterior surface of femur on a line between greater and lesser trochanter i.e. intertrochanteric line

Question 35

What is the function of the quadratus femoris?

Answer 35

external rotation of the thigh and adduction of the thigh

Question 36

Which nerves innervate the superior gemellus?

Answer 36

sacral plexus (nerve to obturator internus and superior gemellus)

Question 37

Which blood vessels supply the superior gemellus?

Answer 37

inferior gluteal artery

Question 38

Where is the origin insertion of the superior gemellus?

Answer 38

outer surface of ischial spine and edge of lesser sciatic notch

Question 39

Where is the insertion of the superior gemellus?

Answer 39

tendon of obturator internus then via this tendon to the surface of the greater trochanter

Question 40

What is the function of the superior gemellus?

Answer 40

lateral rotation of the thigh