Muscles Of Gluteal And Posterior Thigh

Question 0

Gluteus Maximus insertion

Answer 0

Most fibers end in ilio tibial tract which inserts into lateral condyle of tibia
Some fibers insert on gluteal tuberosity of femur

Question 1

Gluteus Maximus origin

Answer 1

Ilium posterior to posterior gluteal line
Dorsal surface of sacrum and coccyx
Sacrotuberous ligament

Question 2

Gluteus Maximus innervation

Answer 2

Inferior gluteal nerve

L5, s1, s2

Question 3

Gluteus Maximus action

Answer 3

Extends hip joint between flexed and standing positions and assists in lateral rotation
Steadies thigh and assists in rising from sitting position

Question 4

Gluteus medius origin

Answer 4

External surface of ilium between anterior and posterior gluteal lines

Question 5

Gluteus medius insertion

Answer 5

Lateral surface of greater trochanter of femur

Question 6

Gluteus medius innervation

Answer 6

Superior gluteal nerve

L4, l5, s1

Question 7

Gluteus medius action

Answer 7

Abduct and anterior portions medially rotate hip joint

Keep pelvis level when opposite limb is elevated

Question 8

Gluteus minimus origin

Answer 8

External surface of ilium between anterior and inferior gluteal lines

Question 9

Gluteus minimus insertion

Answer 9

Anterior surface of greater trochanter of femur

Question 10

Gluteus minimus innervation

Answer 10

Superior gluteal nerve l4, l5, s1

Question 11

Gluteus minimus action

Answer 11

Abduct and anterior portions medially rotate hip joint

Keep pelvis level when opposite limb is elevated

Question 12

Tensor fasciae latae origin

Answer 12

Anterior superior iliac spine

Anterior part of iliac crest

Question 13

Tensor fasciae latae insertion

Answer 13

Ilio tibial tract which attaches to lateral condyle of tibia

Gerdy tubercle

Question 14

Tensor fasciae latae innervation

Answer 14

Superior gluteal nerve l4, l5, s1

Question 15

Tensor Fasciae latae action

Answer 15

Flexes hip joint

Acts with gluteus Maximus to stabilize the extended knee joint

Question 16

Semi tendinous origin

Answer 16

Ischial tuberosity

Question 17

Semitendinosus insertion

Answer 17

Medial surface of superior part of tibia

Question 18

Semitendinosus innervation

Answer 18

Tibial division of sciatic nerve

L5, s1, s2

Question 19

Semitendinosus action

Answer 19

Extend hip joint, flex knee joint and rotate the leg medially when knee is flexed
When hip and knee are flexed, can extend trunk

Question 20

Semimembranosus origin

Answer 20

Ischial tuberosity

Question 21

Semimembranosus insertion

Answer 21

Posterior part of medial condyle of tibia

Reflected attachment forms oblique popliteal ligament to lateral femoral condyle

Question 22

Semimembranosus innervation

Answer 22

Tibial division of sciatic nerve l5, s1, s2

Question 23

Semimembranosus action

Answer 23

Extend hip joint
Flex knee joint and rotate leg medially when knee is flexed
When hip and knee are flexed, can extend trunk

Question 24

Biceps femoris origin

Answer 24

Long head: ischial tuberosity | Short head: linea aspera and lateral supracondylar line of femur

Question 25

Biceps femoris insertion

Answer 25

Lateral side of head of fibula ; tendon is split at this site by fibulae collateral ligament of knee

Question 26

Biceps femoris innervation

Answer 26

Long head: tibial division of sciatic nerve l5, s1 s2 | Short head: common fibulae division of sciatic nerve l5, s1, s2

Question 27

Biceps femoris action

Answer 27

Flexes knee joint and rotates it laterally when knee is flexed Extends hip joint like when starting to walk

Question 28

Piriformis origin

Answer 28

Anterior surface of 2nd to 4th sacral segments | Superior margin of greater sciatic notch and sacrotuberous ligament

Question 29

Piriformis insertion

Answer 29

Superior border of greater trochanter of femur

Question 30

Piriformis innervation

Answer 30

Branches of anterior rami of s1, s2

Question 31

Piriformis action

Answer 31

Laterally rotate extended hip joint Abduct flexed hip joint Steady femoral head in acetabulum (stabilizes hip joint)

Question 32

Obturator internus origin

Answer 32

Pelvic surface of ilium and ischium | Obturator membrane

Question 33

Obturator internus insertion

Answer 33

Medial surface of greater trochanter (trochanteric fossa) of femur

Question 34

Obturator internus innervation

Answer 34

Nerve to obturator internus | L5, s1

Question 35

Obturator internus action

Answer 35

Laterally rotate extended hip joint Abduct flexed hip joint Steady femoral head in acetabulum (stabilizes hip joint)

Question 36

Superior gemelli origin

Answer 36

Ischial spine

Question 37

Inferior gemelli origin

Answer 37

Ischial tuberosity

Question 38

Superior gemelli insertion

Answer 38

Medial surface of greater trochanter (trochanteric fossa) of femur

Question 39

Inferior gemelli insertion

Answer 39

Medial surface of greater trochanter (trochanteric fossa) of femur

Question 40

Superior gemelli innervation

Answer 40

Nerve to obturator internus l5, s1

Question 41

Inferior gemelli innervation

Answer 41

Nerve to quadratus femoris | L5, s1

Question 42

Superior gemelli action

Answer 42

Laterally rotate extended hip joint Abduct flexed hip joint Steady femoral head in acetabulum (stabilizes hip joint)

Question 43

Inferior gemelli action

Answer 43

Laterally rotate extended hip joint Abduct flexed hip joint Steady femoral head in acetabulum ( stabilizes hip joint)

Question 44

Quadratus femoris origin

Answer 44

Lateral border of ischial tuberosity

Question 45

Quadratus femoris insertion

Answer 45

Quadrate tubercle on intertrochanteric crest of femur and area inferior to it

Question 46

Quadratus femoris innervation

Answer 46

Nerve to quadratus femoris l5, s1

Question 47

Quadratus femoris action

Answer 47

Laterally rotates hip joint | Also pulls femoral head into acetabulum to stabilize hip joint/ pelvis