Muscles- gluteal region and posterior thigh

Question 1

Gluteus maximus

attachment

Answer 1

ilium posterior to posterior gluteal line, posterior surface of sacrum and coccyx, sacrotuberous ligament, iliotibial tract to anterolateral tubercle of tibia, and gluteal tuberosity of femur

Question 2

Gluteus maximus

action

Answer 2

extends and laterally rotates thigh, extends trunk

Question 3

Gluteus maximus

innervation

Answer 3

inferior gluteal nerve (L5-S2)

Question 4

Gluteus medius

attachment

Answer 4

ilium between anterior and posterior gluteal lines and greater trochanter of femur

Question 5

Gluteus medius

action

Answer 5

abducts and medially rotates thigh; keeps pelvis level when standing on one leg

Question 6

Gluteus medius

innervation

Answer 6

superior gluteal nerve (L5-S1)

Question 7

Gluteus minimus

attachment

Answer 7

ilium between anterior and inferior gluteal lines and greater trochanter of femur

Question 8

Gluteus minimus

action

Answer 8

abducts and medially rotates thigh; keeps pelvis level when standing on one leg

Question 9

Gluteus minimus

innervation

Answer 9

superior gluteal nerve (L5-S1)

Question 10

Tensor fascia latae

attachment

Answer 10

anterior superior iliac spine, iliac crest, iliotibial tract to anterolateral tubercle of tibia

Question 11

Tensor fascia latae

action

Answer 11

abducts and medially rotates thigh; keeps pelvis level when standing on one leg

Question 12

Tensor fascia latae

innervation

Answer 12

superior gluteal nerve (L5-S1)

Question 13

Piriformis

attachment

Answer 13

anterior surface of sacrum to greater trochanter of femur

Question 14

Piriformis

action

Answer 14

laterally rotates an extended thigh; abducts a flexed thigh

Question 15

Piriformis

innervation

Answer 15

branches of anterior rami S1-S2

Question 16

Obturator internus

attachment

Answer 16

internal surface of obturator membrane, internal margin of obturator foramen, greater trochanter of femur

Question 17

Obturator internus

action

Answer 17

laterally rotates an extended thigh; abducts a flexed thigh

Question 18

Obturator internus

innervation

Answer 18

nerve to obturator internus (L5-S1)

Question 19

Superior gemellus

attachment

Answer 19

ischial spine to greater trochanter femur

Question 20

Superior gemellus

action

Answer 20

laterally rotates an extended thigh; abducts a flexed thigh

Question 21

Superior gemellus

innervation

Answer 21

nerve to obturator internus (L5-S1)

Question 22

Inferior gemellus

attachment

Answer 22

ischial tuberosity to greater trochanter femur

Question 23

Inferior gemellus

action

Answer 23

laterally rotates an extended thigh; abducts a flexed thigh

Question 24

Inferior gemellus

innervation

Answer 24

nerve to quadratus femoris (L5-S1)

Question 25

Quadratus femoris | attachment

Answer 25

ischial tuberosity to intertrochanteric crest of femur

Question 26

Quadratus femoris | action

Answer 26

laterally rotates thigh

Question 27

Quadratus femoris | innervation

Answer 27

nerve to quadratus femoris (L5-S1)

Question 28

Semitendinosus | attachment

Answer 28

ischial tuberosity and inferior to medial condyle of tibia via pes anserinus

Question 29

Semitendinosus | action

Answer 29

extends thigh or trunk; flexes and rotates leg medially

Question 30

Semitendinosus | innervation

Answer 30

tibial nerve (L5-S2)

Question 31

Semimembranosus | attachment

Answer 31

ischial tuberosity and medial epicondyle of tibia

Question 32

Semimembranosus | action

Answer 32

extends thigh or trunk; flexes and rotates leg medially

Question 33

Semimebranosus | innervation

Answer 33

tibial nerve (L5-S2)

Question 34

Biceps femoris-long head | attachment

Answer 34

ischial tuberosity to head of fibula

Question 35

Biceps femoris-long head | action

Answer 35

extends thigh or trunk; flex and rotate leg laterally

Question 36

Biceps femoris-long head | innervation

Answer 36

tibial nerve (L5-S2)

Question 37

Biceps femoris-short head | attachment

Answer 37

linea aspera and lateral supracondylar line of femur to head of fibula

Question 38

Biceps femoris-short head | action

Answer 38

flex and rotate leg laterally

Question 39

Biceps femoris-short head | innervation

Answer 39

common fibular nerve (L5-S2)