Posterior Hip (Gluteal) Muscles and Posterior Thigh Muscles

Question 1

origin and insertion of Tensor Fascia Lata

Answer 1

origin: crest/ilium
insertion: iliotibial tract

Question 2

action of Tensor Fascia Lata

Answer 2

helps stabilize knee

Question 3

innervation of Tensor Fascia Lata

Answer 3

Superior Gluteal nerve

Question 4

origin and insertion of Gluteus Maximus

Answer 4

origin: posterior gluteal line/ilium
insertion: gluteal tuberosity/femur

Question 5

action of Gluteus Maximus

Answer 5

laterally rotates femur

Question 6

innervation of Gluteus Maximus

Answer 6

inferior gluteal nerve

Question 7

origin and insertion of Gluteus Medius

Answer 7

origin: external surface (b/w post and ant gluteal lines)/ilium
insertion: greater trochanter/femur

Question 8

action of Gluteus Medius

Answer 8

medially rotates femur

Question 9

innervation of Gluteus Medius

Answer 9

superior gluteal nerve

Question 10

origin and insertion of gluteus minimus

Answer 10

origin: external surface (b/w post and ant gluteal lines)/ilium
insertion: greater trochanter/femur

Question 11

action of gluteus minimus

Answer 11

medially rotates femur

Question 12

innervation of gluteus minimus

Answer 12

superior gluteal nerve

Question 13

origin and insertion of piriformis

Answer 13

origin: anterior surface/sacrum
insertion: greater trochanter/femur

Question 14

action of piriformis

Answer 14

laterally rotates femur

Question 15

innervation of piriformis

Answer 15

S1,S2

Question 16

origin and insertion of superior gemellus

Answer 16

origin: spine/ischium
insertion: greater trochanter/femur

Question 17

action of superior gemellus

Answer 17

laterally rotates femur

Question 18

innervation of superior gemellus

Answer 18

L4,L5,S1,S2

Question 19

origin and insertion of obturator internus

Answer 19

origin: internal surface/obturator membrane
insertion: greater trochanter/femur

Question 20

action of obturator internus

Answer 20

laterally rotates femur

Question 21

innervation of obturator internus

Answer 21

L4,L5,S1,S2

Question 22

origin and insertion of inferior gemellus

Answer 22

origin: ischial tuberosity
insertion: greater trochanter/femur

Question 23

action of inferior gemellus

Answer 23

laterally rotates femur

Question 24

innervation of inferior gemellus

Answer 24

L4,L5,S1,S2

Question 25

origin and insertion of obturator externus

Answer 25

origin: external surface obturator membrane
insertion: trochanteric fossa/femur

Question 26

action of obturator externus

Answer 26

laterally rotates femur

Question 27

innervation of obturator externus

Answer 27

obturator nerve

Question 28

origin and insertion of quadratus femoris

Answer 28

origin: ischial tuberosity
insertion: quadrate tubercle/femur

Question 29

action of quadratus femoris

Answer 29

laterally rotates femur

Question 30

innervation of quadratus femoris

Answer 30

L4,L5,S1,S2

Question 31

origin and insertion of semitendinosus

Answer 31

origin: ischial tuberosity
insertion: medial condyle/tibia

Question 32

action of semitendinosus

Answer 32

flexion of leg at knee

Question 33

innervation of semitendinosus

Answer 33

sciatic nerve

Question 34

origin and insertion of semimembranosus

Answer 34

origin: ischial tuberosity
insertion: medial condyle/tibia

Question 35

action of semimembranosus

Answer 35

flexion of leg at knee

Question 36

innervation of semimembranosus

Answer 36

sciatic nerve

Question 37

origin and insertion of biceps femoris–long head

Answer 37

origin: long head=ischial tuberosity
insertion: long head=lateral condyle/tibia

Question 38

action of biceps femoris (long and short head)

Answer 38

flexion of leg at knee

Question 39

innervation of biceps femoris (long and short head)

Answer 39

sciatic nerve

Question 40

origin and insertion of biceps femoris–short head

Answer 40

origin: linea aspera/femur
insertion: lateral condyle/tibia