Hip Muscles

Question 0

Gluteus Maximus Insertion

Answer 0

Most fibers = iliotibial tract, which inserts into lateral condyle of tibia
Some fibers = gluteal tuberosity of femur

Question 1

Gluteus Maximus Origin

Answer 1

1. ilium posterior to posterior gluteal line
2. dorsal surface of sacrum and coccyx
3. sacrotuberous ligament

Question 2

Gluteus Maximus Innervation

Answer 2

Inferior Gluteal Nerve (L5, S1, S2)

Question 3

Gluteus Maximus Action

Answer 3

• Extends thigh and assists in its 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 medially rotate thigh

- Keep pelvis level when opposite leg is raised

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 Innvervation

Answer 10

Superior Gluteal Nerve (L4, L5, S1)

Question 11

Gluteus Minimus Action

Answer 11

• Abduct and medially rotate thigh

- Keep pelvis level when opposite leg is raised

Question 12

Tensor fascia lata Origin

Answer 12

1. ASIS

2. Anterior part of iliac spine

Question 13

Tensor fascia lata Insertion

Answer 13

Iliotibial tract, which attaches to lateral condyle of tibia

Question 14

Tensor fascia lata Innervation

Answer 14

Superior Gluteal Nerve (L4, L5, S1)

Question 15

Tensor fascia lata Action

Answer 15

flexes thigh

Question 16

Piriformis Origin

Answer 16

1. Anterior surface of 2nd-4th sacral segments
2. Superior margin of greater sciatic notch
3. Sacrotuberous ligament

Question 17

Piriformis Insertion

Answer 17

Superior border of greater trochanter of femur

Question 18

Piriformis Innervation

Answer 18

Branches of anterior rami of S1, S2

Question 19

Piriformis Action

Answer 19

• laterally rotate extended thigh
• abduct flexed thigh
• steady femoral head in acetabulum (stabilizes hip joint)

Question 20

Obturator Internus Origin

Answer 20

1. Pelvic surface of ilium and ishium

2. obturator membrane

Question 21

Obturator Internus Insertion

Answer 21

Medial surface of greater trochanter

Question 22

Obturator Internus Innervation

Answer 22

Nerve to obturator internus (L5, S1)

Question 23

Obturator Internus Action

Answer 23

• laterally rotate extended thigh
• adbuct flexed thigh
• steady femoral head in acetabulum

Question 24

Gemelli, superior and inferior Origin

Answer 24

Superior: ischial spine Inferior: ischial tuberosity

Question 25

Gemelli Insertion

Answer 25

Medial surface of greater trochanter

Question 26

Gemelli Innervation

Answer 26

Superior: Nerve to Obturator Internus (L5, S1) Inferior: Nerve to Quadratus Femoris (L5,S1)

Question 27

Gemelli Action

Answer 27

- laterally rotate extended thigh - abduct flexed thigh - steady femoral head in acetabulum

Question 28

Quadratus Femoris Origin

Answer 28

lateral border of ischial tuberosity

Question 29

Quadratus Femoris Insertion

Answer 29

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

Question 30

Quadratus Femoris Innervation

Answer 30

Nerve to Quadratus Femoris (L5, S1)

Question 31

Quadratus Femoris Action

Answer 31

- laterally rotates thigh | - steadies femoral head in acetabulum

Question 32

Semitendinosus Origin

Answer 32

ischial tuberosity

Question 33

Semitendinosus Insertion

Answer 33

Medial surface of superior part of tibia

Question 34

Semitendinosus Innervation

Answer 34

Tibial division of Sciatic Nerve (L5, S1, S2)

Question 35

Semitendinosus Action

Answer 35

- Extend thigh - Flex leg and rotate it medially when knee is flexed - When thigh and leg flexed, can extend trunk

Question 36

Semimembranosus Origin

Answer 36

ischial tuberosity

Question 37

Semimembranosus Insertion

Answer 37

- Posterior part of medial condyle of tibia | - Reflected attachment forms oblique popliteal ligament (to lateral femoral condyle)

Question 38

Semimembranosus Innervation

Answer 38

Tibial division of Sciatic Nerve (L5, S1, S2)

Question 39

Semimembranosus Action

Answer 39

- extend thigh - flex leg and rotate it medially when knee is flexed - when thigh and leg flexed, can extend trunk

Question 40

Biceps Femoris Origin

Answer 40

long head: ischial tuberosity | short head: linea aspera and lateral supracondylar line of femur

Question 41

Biceps Femoris Insertion

Answer 41

- lateral side of head of fibula | - tendon is split at this site by fibular collateral ligament of knee

Question 42

Biceps Femoris Innervation

Answer 42

long head: tibial division of Sciatic Nerve (L5, S1, S2) | short head: common fibular division of Sciatic Nerve (L5, S1, S2)

Question 43

Biceps Femoris Action

Answer 43

- flexes leg and rotates it laterally when knee is flexed | - extends thigh (e.g. when starting to walk)