Gluteal Region & Posterior Thigh

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 Insertion

Answer 2

Most fibers end in iliotibial tract that inserts into lateral condyle of tibia; some insert on gluteal tuberosity

Question 3

Gluteus Maximus Action

Answer 3

Extends thigh and assists in its lateral rotation; steadies thigh and assists in rising from sitting

Question 4

Gluteus Maximus Innervation

Answer 4

Inferior gluteal nerve (L5, S1, S2)

Question 5

Gluteus Medius Origin

Answer 5

External surface of ilium between anterior and posterior gluteal lines

Question 6

Gluteus Medius Insertion

Answer 6

Lateral surface of greater trochanter of femur

Question 7

Gluteus Medius Action

Answer 7

Abduct and medially rotate thigh; keep pelvis level when ipsilateral limb is WB and advance opposite side during swing phase

Question 8

Gluteus Medius Innervation

Answer 8

Superior Gluteal Nerve (L5, S1)

Question 9

Piriformis Origin

Answer 9

Anterior surface of sacrum; sacrotuberous ligament

Question 10

Piriformis Insertion

Answer 10

Superior border of greater trochanter of femur

Question 11

Piriformis Action

Answer 11

Laterally rotate extended thigh and abduct flexed thigh; steady femoral head in acetabulum

Question 12

Piriformis Innervation

Answer 12

Branches of anterior rami of S1 and S2

Question 13

Superior Gemellus Origin

Answer 13

Ischial Spine

Question 14

Superior Gemellus Insertion

Answer 14

Medial surface of greater trochanter (trochanteric fossa) of femur

Question 15

Superior Gemellus Action

Answer 15

Laterally rotate extended thigh and abduct flexed thigh; steady femoral head in acetabulum

Question 16

Superior Gemellus Innervation

Answer 16

Nerve to obturator internus (L5, S1)

Question 17

Inferior Gemellus Origin

Answer 17

Ischial tuberosity

Question 18

Inferior Gemellus Insertion

Answer 18

Medial surface of greater trochanter (trochanteric fossa) of femur

Question 19

Inferior Gemellus Action

Answer 19

Laterally rotate extended thigh and abduct flexed thigh; steady femoral head in acetabulum

Question 20

Inferior Gemellus Innervation

Answer 20

Nerve to quadratus femoris (L5, S1)

Question 21

Obturator Internus Origin

Answer 21

Pelvic surface of ilium and ischium and obturator membrane

Question 22

Obturator Internus Insertion

Answer 22

Medial surface of greater trochanter of femur

Question 23

Obturator Internus Action

Answer 23

Laterally rotate extended thigh and abduct flexed thigh; steady femoral head in acetabulum

Question 24

Obturator Internus Innervation

Answer 24

Nerve to obturator internus (L5, S1)

Question 25

Quadratus Femoris Origin

Answer 25

Lateral border of ischial tuberosity

Question 26

Quadratus Femoris Insertion

Answer 26

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

Question 27

Quadratus Femoris Action

Answer 27

Laterally rotates thigh; steadies femoral head in acetabulum

Question 28

Quadratus Femoris Innervation

Answer 28

Nerve to quadratus femoris (L5, S1)

Question 29

Tensor Fascia Lata Origin

Answer 29

Anterior superior iliac spine; anterior part of iliac crest

Question 30

Tensor Fascia Lata Insertion

Answer 30

Iliotibial tract, which attaches to lateral condyle of tibia

Question 31

Tensor Fascia Lata Action

Answer 31

Abduct and medially rotate thigh; keep pelvis level when ipsilateral limb is WB and advance opposite side during swing phase

Question 32

Tensor Fascia Lata Innervation

Answer 32

Superior gluteal nerve (L5, S1)

Question 33

Biceps femoris Long Head Origin

Answer 33

Ischial tuberosity

Question 34

Biceps femoris Long Head Innervation

Answer 34

Tibial division of sciatic nerve (L5, S1, S2)

Question 35

Biceps femoris short head origin

Answer 35

Linea aspera and lateral supracondylar line of femur

Question 36

Biceps femoris short head Innervation

Answer 36

Common fibular division of sciatic nerve (L5, S1, S2)

Question 37

Biceps femoris Insertion

Answer 37

Lateral side of head of fibula

Question 38

Biceps femoris Action

Answer 38

Flexes leg and rotates it laterally when knee is flexed; extends thigh

Question 39

Semimembranosus Origin

Answer 39

Ischial Tuberosity

Question 40

Semimembranosus Insertion

Answer 40

Posterior part of medial condyle of tibia; refected attachement forms oblique popliteal ligament

Question 41

Semimembranosus Action

Answer 41

Extend thigh; flex leg and rotate it medially when knee is flexed; extends trunk when thigh and leg are flexed

Question 42

Semimembranosus Innervation

Answer 42

Tibial division of sciatic nerve (L5, S1, S2)

Question 43

Semitendinosus Origin

Answer 43

Ischial Tuberosity

Question 44

Semitendinosus Insertion

Answer 44

Medial surface of superior part of tibia (Pes anserine)

Question 45

Semitendinosus Action

Answer 45

Extend thigh; flex leg and rotate it medially when knee is flexed; extends trunk when thigh and leg are flexed

Question 46

Semitendinosus Innervation

Answer 46

Tibial division of sciatic nerve (L5, S1, S2)

Question 47

Adductor Magnus Hamstring Part origin

Answer 47

Ischial Tuberosity

Question 48

Adductor Magnus Hamstring Part insertion

Answer 48

Adductor tubercle of femur

Question 49

Adductor Magnus Hamstring Part Action

Answer 49

Extends thigh

Question 50

Adductor Magnus Hamstring Part Innervation

Answer 50

Tibial division of sciatic nerve (L4)

Question 51

Gluteus Minimus Origin

Answer 51

External surface of ilium between anterior and inferior gluteal lines

Question 52

Gluteus Minimus Insertion

Answer 52

Anterior surface of greater trochanter of femur

Question 53

Gluteus Minimus Action

Answer 53

Abduct and medially rotate thigh; keep pelvis level when ipsilateral limb is WB and advance opposite side during swing phase

Question 54

Gluteus Minimus Innervation

Answer 54

Superior gluteal nerve (L5, S1)