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MS 2 > Lecture 9 Kinesiology of the Hip > Flashcards

Lecture 9 Kinesiology of the Hip Flashcards

1
Q

What is the JT of the hip?

A

Coxofemoral JT

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2
Q

What is the CPP of the hip JT?

A

extension, internal rotation, abduction

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3
Q

What is the capsular pattern of the hip?

A

internal rotation, flexion, abduction (variable)

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4
Q

What is the typical dislocation of the hip JT?

A

posterior (85%), usually due to major trauma, ie: knees to dash MVA

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5
Q

What type of JT is the hip?

A

ball and socket synovial

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6
Q

What are the 3 main ligaments of the hip?

A

iliofemoral / Y ligament
pubofemoral ligament
ligamentum teres / ligament of head of femur

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7
Q

What is the zona orbicularis?

A

thickening of the joint capsule around the neck of the femur

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8
Q

The acetabulum faces what direction?

A

lateral, anterior and inferior

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9
Q

What direction does the femoral head face?

A

medial, anterior and superior

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10
Q

What is coxa varum?

A

occurs when the inclination of the femoral neck is less than 125 degrees.

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11
Q

What is coxa valgum?

A

occurs when the angle of inclination of the femoral neck is greater than 135 degrees

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12
Q

What is femoral anteversion?

A

occurs when the angle of torsion of the femoral neck is greater than 15 degrees. Results in toe-in stance

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13
Q

What is femoral retroversion?

A

occurs when the angle of torsion is less than 15 degrees, results in toeing-out

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14
Q

What are movements of the hip JT?

A

flex/ex
abd/add
internal/external rotation

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15
Q

What is the plane and axis of hip flex/ex?

A

medial lateral axis
sagittal plane

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16
Q

What is the plane and axis of hip ABD and ADD?

A

anterior posterior axis
frontal plane

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17
Q

What is the plane and axis of the hip IR/ER?

A

mechanical axis of the femur, no plane

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18
Q

What often accompanies decreased ROM at the hip?

A

compensatory increases at the pelvis and lumbar spine

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19
Q

What are the articulating surfaces of the hip JT?

A

Lunate surface of the acetabulum
Head of the femur

20
Q

What does the iliofemoral ligament limit?

A

limits hyperextension
prevents posterior pelvic tilt during relaxed standing
(strongest of the three ligaments)

21
Q

What does the pubofemoral ligament limit?

A

Limits hyperextension, lateral rotation and abduction

22
Q

What does the ischiofemoral ligament limit?

A

Hyperextension
Abduction
medial rotation
Also limits hyperflextion
(weakest of the three)

23
Q

What does the ligamentum teres or ligament of the head of femur do?

A

Helps provide vascular supply to femoral head via obturator artery

24
Q

What does the transverse acetabular ligament do?

A

Closes in the acetabulum to maximize femoral congruency

25
Q

Where is the iliopectineal bursa?

A

Anterior to iliofemoral and pubofemoral ligaments, posterior to iliopsoas tendon

26
Q

When does coxa varum occur?

A

When the angle of inclination of the femoral neck is less than 125 degrees

27
Q

When does coxa varum occur?

A

When the angle of inclination of the femoral neck is less than 125 degrees

28
Q

When does caxa valgum occur?

A

When the angle of inclination is greater than 135 degrees

29
Q

What occurs when the angle of torsion of the femoral neck is greater than 15 degrees?

A

Femoral anteversion
(Toe in stance)

30
Q

What occurs when the angle of torsion is less than 15 degrees?

A

femoral retroversion
(toeing out)

31
Q

Decreased ROM in the hip is often accompanied by what?

A

Compensatory increases at the pelvis and lumbar spine

32
Q

In what axis and plane do anterior and posterior pelvic tilt occur?

A

occurs around a medial lateral axis within a sagittal plane

33
Q

What movement is anterior pelvic tilt equivalent to in relative terms?

A

hip flexion

34
Q

Lateral pelvic tilt occurs around what axis and in what plane?

A

anterior posterior axis within the frontal plane

35
Q

What movements accompany pelvic rotation?

A

lateral flexion of the spine
abduction or adduction of the hip on the supporting side

36
Q

What happens during hip hiking?

A

hip abd on the supported side and add on the unsupported side
lateral lumbar flexion toward the unsupported side to maintain balance
may be observed w/ coxa valga as a compensatory mechanism to accomodate the anatomic long leg and bring the feet into normal alignment.
subsequent tightness in the ITB and abductors on the supported side may result.

37
Q

What happens during hip drop?

A

hip abduction on the unsupported side
lateral lumbar flexion toward the suported side to maintain balance
This posture may be observed w/ coxa vara to accomodate the anatomical short leg, with adverse effects on patellofemoral tracking.

38
Q

Pelvic rotation occurs around what axis and in what plane?

A

around a vertical axis in the transverse plane

39
Q

What is lumbopelvic motion?

A

lumbar and pelvic coordinated movement which allows full trunk flexion or leg abduction

40
Q

What are the prime movers of the hip?

A

iliopsoas
rectus femoris and startorius
TFL
hamstring group
glutes
adductor group
deep 6

41
Q

What are the synergists of the hip?

A

abdominals
sartorius and TFL

42
Q

What muscles are keys in controlling vertebral and pelvic motion during leaning back and returning to an upright position?

A

iliopsoas

43
Q

What muscles act with the abdominals during sit up type motions and straight leg raising?

A

iliopsoas

44
Q

Rectus femoris flexes the hip with the knee in what position and why?

A

with the knee flexed.
Knee extension leads to active insufficiency

45
Q

What muscles is relatively resistant to active insufficiency during simultaneous hip and knee flexion?

A

sartorius

46
Q

What muscle works synergistically with sartorius to eliminate hip rotation during flexion?

A

TFL

47
Q

Which way does sartorius rotate the hip?

A

external rotation

MS 2 (39 decks)

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