Muscles Of Gluteal And Posterior Thigh Flashcards Preview

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Flashcards in Muscles Of Gluteal And Posterior Thigh Deck (48):
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Gluteus Maximus origin

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

1

Gluteus Maximus insertion

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

2

Gluteus Maximus innervation

Inferior gluteal nerve
L5, s1, s2

3

Gluteus Maximus action

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

4

Gluteus medius origin

External surface of ilium between anterior and posterior gluteal lines

5

Gluteus medius insertion

Lateral surface of greater trochanter of femur

6

Gluteus medius innervation

Superior gluteal nerve
L4, l5, s1

7

Gluteus medius action

Abduct and anterior portions medially rotate hip joint
Keep pelvis level when opposite limb is elevated

8

Gluteus minimus origin

External surface of ilium between anterior and inferior gluteal lines

9

Gluteus minimus insertion

Anterior surface of greater trochanter of femur

10

Gluteus minimus innervation

Superior gluteal nerve l4, l5, s1

11

Gluteus minimus action

Abduct and anterior portions medially rotate hip joint
Keep pelvis level when opposite limb is elevated

12

Tensor fasciae latae origin

Anterior superior iliac spine
Anterior part of iliac crest

13

Tensor fasciae latae insertion

Ilio tibial tract which attaches to lateral condyle of tibia
Gerdy tubercle

14

Tensor fasciae latae innervation

Superior gluteal nerve l4, l5, s1

15

Tensor Fasciae latae action

Flexes hip joint
Acts with gluteus Maximus to stabilize the extended knee joint

16

Semi tendinous origin

Ischial tuberosity

17

Semitendinosus insertion

Medial surface of superior part of tibia

18

Semitendinosus innervation

Tibial division of sciatic nerve
L5, s1, s2

19

Semitendinosus action

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

20

Semimembranosus origin

Ischial tuberosity

21

Semimembranosus insertion

Posterior part of medial condyle of tibia
Reflected attachment forms oblique popliteal ligament to lateral femoral condyle

22

Semimembranosus innervation

Tibial division of sciatic nerve l5, s1, s2

23

Semimembranosus action

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

24

Biceps femoris origin

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

25

Biceps femoris insertion

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

26

Biceps femoris innervation

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

27

Biceps femoris action

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

28

Piriformis origin

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

29

Piriformis insertion

Superior border of greater trochanter of femur

30

Piriformis innervation

Branches of anterior rami of s1, s2

31

Piriformis action

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

32

Obturator internus origin

Pelvic surface of ilium and ischium
Obturator membrane

33

Obturator internus insertion

Medial surface of greater trochanter (trochanteric fossa) of femur

34

Obturator internus innervation

Nerve to obturator internus
L5, s1

35

Obturator internus action

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

36

Superior gemelli origin

Ischial spine

37

Inferior gemelli origin

Ischial tuberosity

38

Superior gemelli insertion

Medial surface of greater trochanter (trochanteric fossa) of femur

39

Inferior gemelli insertion

Medial surface of greater trochanter (trochanteric fossa) of femur

40

Superior gemelli innervation

Nerve to obturator internus l5, s1

41

Inferior gemelli innervation

Nerve to quadratus femoris
L5, s1

42

Superior gemelli action

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

43

Inferior gemelli action

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

44

Quadratus femoris origin

Lateral border of ischial tuberosity

45

Quadratus femoris insertion

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

46

Quadratus femoris innervation

Nerve to quadratus femoris l5, s1

47

Quadratus femoris action

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