PosteriorThigh Flashcards

1
Q

biceps femoris origin

A

ischial tuberosity, distal femur

short head: lateral lip of linea aspera

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2
Q

biceps femoris insertion

A

lateral head of fibula

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3
Q

biceps femoris innervation

A

tibial division of sciatic

short head: common fibular division of the sciatic nerve

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4
Q

biceps femoris action

A

thigh extension, knee flexion, leg lateral rotation

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5
Q

semitendinosis insertion

A

pes anserine of medial tibia

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6
Q

semitendinosis innervation

A

sciatic

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7
Q

semitendinosis action

A

thigh extension, knee flexion, medial rotation

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8
Q

semimembranosis origin

A

ischial tuberosity

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9
Q

semimembranosis insertion

A

medial tibia

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10
Q

semimembranosis innervation

A

sciatic

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11
Q

semimembranosis action

A

thigh extension, knee flexion, medial rotation

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12
Q

semimembranosis action

A

thigh extension, knee flexion, medial rotation

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13
Q

gluteus maximus origin

A

ilium posterior to posterior gluteal line, dorsal surface of sacrum and coccyx, and sacrotuberous ligament

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14
Q

gluteus maximus insertion

A

iliotibial tract, some fibers insert on gluteal tuberosity

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15
Q

gluteus maximus innervation

A

inferior gluteal nerve

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16
Q

trochanteric bursa

A

separates gluteus maximus from greater trochanter

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17
Q

gluteofemoral bursa

A

separates the iliotibial tract from superior part of proximal attachment of vastus lateralis

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18
Q

ischial bursa

A

separates inferior part of gluteus maximus from ischial tuberosity; often absent

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19
Q

gluteus medius origin

A

External surface of ilium between anterior and posterior gluteal lines

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20
Q

gluteus medius insertion

A

lateral surface of greater trochanter of femur

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21
Q

gluteus medius innervation

A

superior gluteal

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22
Q

gluteus medius action

A

Abduct and medially rotate the thigh, keeps pelvis level when opposite leg is raised

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23
Q

gluteus minimus origin

A

external surface of ilium between anterior and inferior gluteal lines

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24
Q

gluteus minimus insertion

A

anterior surface of greater trochanter of femur

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25
Q

gluteus minimus innervation

A

superior gluteal

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26
Q

gluteus minimus action

A

Abduct and medially rotate the thigh, keeps pelvis level when opposite leg is raised

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27
Q

piriformis action

A

laterally rotates extend thigh; abducts flexed thigh; steadies femoral head in acetabulum

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28
Q

piriformis origin

A

anterior surface of sacrum and sacrotuberus ligament

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29
Q

piriformis insertion

A

superior border of greater trochanter of femur

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30
Q

piriformis innervation

A

branches of ventral rami S1 and S2

31
Q

piriformis action

A

laterally rotates extend thigh; abducts flexed thigh; steadies femoral head in acetabulum

32
Q

what muscles make up the triceps coxae?

A

superior gemellus
obturator internus
inferior gemellus

33
Q

how are the superior and inferior gemelli named?

A

according to their relationship to the obturator internus

34
Q

what is the action of the muscles of the triceps coxae?

A

laterally rotate the extended thigh; abduct the flexed thigh; steady the femoral head in the acetabulum

35
Q

obturator internus origin

A

Pelvic surface of obturator membrane & surrounding bones

36
Q

obturator internus insertion

A

Medial surface of greater trochanter (trochanteric fossa)

37
Q

obturator internus innervation

A

Nerve to obturator internus (L5,S1)

38
Q

obturator internus action

A

laterally rotate the extended thigh; abduct the flexed thigh; steady the femoral head in the acetabulum

39
Q

superior gemellus origin

A

Ischial spine

40
Q

superior gemellus insertions

A

Medial surface of greater trochanter (trochanteric fossa)

41
Q

superior gemellus innervation

A

Nerve to obturator internus (L5,S1)

42
Q

superior gemellus action

A

laterally rotate the extended thigh; abduct the flexed thigh; steady the femoral head in the acetabulum

43
Q

inferior gemellus origin

A

ischial tuberosity

44
Q

inferior gemellus insertion

A

Medial surface of greater trochanter (trochanteric fossa)

45
Q

inferior gemellus innervation

A

Nerve to quadratus femoris (L5,S1)

46
Q

inferior gemellus action

A

laterally rotate the extended thigh; abduct the flexed thigh; steady the femoral head in the acetabulum

47
Q

quadratus femoris origin

A

Lateral border of ischial tuberosity

48
Q

quadratus femoris insertion

A

Quadrate tubercle on intertrochanteric crest & inferior to it

49
Q

quadratus femoris innervation

A

Nerve to Quadratus femoris (L5 & S1)

50
Q

obturator externus origin

A

Obturator foramen & membrane

51
Q

obturator externus insertion

A

Trochanteric fossa of femur

52
Q

obturator externus innervation

A

Obturator nerve (L3 & 4)

53
Q

a decreased angle of inclination is known as

A

coxa vara

54
Q

coxa vara results in

A

a shorter leg

less force is required by the abductors to resist gravity during single leg stance

55
Q

angle of inclination

A

femoral shaft and neck in frontal plane
normal angle varies with age, sex, development (average 125-130˚)
alters the length-tension relationships of muscles
in childhood it is 150˚

56
Q

an increased angle of inclination is known as

A

coxa valga

57
Q

coxa valga results in

A

a longer leg
head directed superiorly in acetabulum
shortens moment arm of abductors, decreasing mechanical advantage
increases stress at medial knee

58
Q

angle of torsion

A

axis of head and neck to femoral condyles
in transverse plane
~15˚

59
Q

anteversion

A

angle of torsion greater than 15˚

60
Q

excessive anteversion results in

A

toe-in when hip aligned

61
Q

retroversion

A

angle of torsion less than 15˚

62
Q

retroversion results in

A

toe-out when hip aligned

63
Q

retroversion results in

A

toe-out when hip aligned

64
Q

vara/varum

A

pathological decrease in medial knee angle

65
Q

vara/varum

A

pathological decrease in medial side angle

66
Q

valga/valgus

A

pathological increase in medial side angle

67
Q

Q angle

A

line representing the resultant line of force ofthe quadriceps,made by connecting a point near the ASIS to the mid-point of thePatella.
In women the Q angle should be less than 22 degrees with knee extension
In men: less than 18 degree

68
Q

increased Q angle may

A

increase the lateral pull on the patella and potentially add more stress on the ACL leading to injury: theory that increases issues with females at the ACL

69
Q

what affects Q angle?

A

femoral anteversion, tibial torsion, Genu valgum

70
Q

whatever happens at the hip effects

A

the knee

71
Q

what increases incidence of dislocation of the hip?

A

coxa valga

72
Q

slipped capital femoral epiphysis (SCFE)

A

10-17 yrs of age Males more often
Shearing with Abduction and Lateral Rotation
Coxa Vara if slow developing

73
Q

legg-calve-perthes disease

A

disruption of blood flow to the head of the femur
Juvenile arthritis
Limited flexion, abduction, internal rotation