Hip Anatomy: Joints and Angles
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1
what are the three factors related to structural instability of the joint?
1) shallow acetabulum
2) neck shaft greater than 140 and excessive anteversion OR retroversion and interior acetabular insufficiency
3) dysplasia in females
2) neck shaft greater than 140 and excessive anteversion OR retroversion and interior acetabular insufficiency
3) dysplasia in females
2
what is the resting position of the hip
30 flexion
30 ABD
30 ER
30 ABD
30 ER
3
what is the closed pack position of the hip
extension
IR
ABD
IR
ABD
4
what is the capsular pattern of the hip
flexion, abduction, internal rotation
5
what is the angle of inclination of femur in adults
125 degrees
6
what is the angle of inclination of femur in newborns
140-150
7
what is coxa valga
>135
8
what is coxa vara
<125
9
<125
Coxa vara or valga
Coxa vara or valga
coxa vara
10
>135
Coxa vara or valga
Coxa vara or valga
coxa valga
11
SCFE or LCP
Bilateral
Bilateral
SCFE
12
SCFE or LCP
Sel-limiting
Sel-limiting
LCP
13
SCFE or LCP
higher in black populations
higher in black populations
SCFE
14
SCFE or LCP
higher in white populations
higher in white populations
SCFE
15
Age and gender for SCFE
males 8-15
16
age and gender for LCP
males 4-10
17
SCFE or LCP
displacement of femoral neck
displacement of femoral neck
SCFE
18
SCFE or LCP
displacement of femoral head
displacement of femoral head
LCP
19
child presents with limping with no specific MOI, loss of IR rom and increase ER rom
what is it??
what is it??
SCFE
20
What RO< will change in a pt with SCFE
loss of IR ROM
Increased ER ROM on involved side
Increased ER ROM on involved side
21
late stage of ____ has leg length shortening
SCFE
22
CAM or PINCER
femoral head not spherical
femoral head not spherical
CAM
23
CAM or PINCER
protrusion of head-neck junction occurring at proximal femur
protrusion of head-neck junction occurring at proximal femur
CAM
24
what is the alpha angle degree for CAM
greater than 60
25
what is the head neck offset ratio for CAM
less than 0.14
26
CAM or Pincer???
acetabular abnormalities, general (protrusion) and localized anterosuperior acetabular over coverage of the femur (acetabular retroversion)
acetabular abnormalities, general (protrusion) and localized anterosuperior acetabular over coverage of the femur (acetabular retroversion)
pincer
27
CAM or PINCER
increased acetabular depth
increased acetabular depth
pIncer
28
CAM has an Increased _____
femoral neck diameter
29
PINCER has a increased _______
acetabular depth
30
Pincer has an
increased acetabular ____ and decreased acetabular ____
increased acetabular ____ and decreased acetabular ____
increased acetabular depth and decreased acetabular inclination
31
are pts symptomatic in mechanical FAI?
no
32
are pts symptomatic when they have a symptomatic FAI?
yes
33
what is the issue with the femur or femoral head in PINCER
nothing is wrong
34
what is the issue with the femur or femoral head in CAM
something in the shape of the head/neck has changed
35
pincer: where is there not enough space from???
from an acetabular problem
36
CAM: where is there not enough space from?
from decreased space from the femu
37
what gender does pincer affect
middle aged active females
38
what gender foes CAM affect
MALES>females
39
what are the 6 clinical summary risk factors for FAI??
1) repetitive impingement resulting in articular cartilage
2) trauma
3) forceful rotation while hyperextended
4) rapid pivoting
5) retroversion
6) labral tears
2) trauma
3) forceful rotation while hyperextended
4) rapid pivoting
5) retroversion
6) labral tears
40
articular cartilage anatomy is ___ and ___
avascular and aneural
41
where is there no articular cartilage (in the hip)
at the fovea capitis
42
where is articular cartilage the thickest?
in the anterior-superior region of the femoral head
43
the cartilage that lines the acetabulum is contiguous within _____
the labrum
44
what are the 4 functions of the hip labrum
1) deppens socket
2) acts as a buffer by decreasing forces
3) negative intra-articular pressure
4) Contains free nerve endings suggested to play a potential role in proprioception and potential sources of pain
2) acts as a buffer by decreasing forces
3) negative intra-articular pressure
4) Contains free nerve endings suggested to play a potential role in proprioception and potential sources of pain
45
where is the acetabular labrum thickets and what shape is it
horseshoe shape
thickest superiorly
thickest superiorly
46
what is the acetabular labrum innervated by
branch of the nerve to the quadratus femoris and the obturator nerve
47
whats the vascularization and innervation of acetabular labrum like?
limited
48
standing is ___ times the body weight
0.3
49
standing on one leg is ___ times the body weight
2.4-2.6
50
walking is ___ times the body weight
1.3-5.8
51
walking up the stairs ___ times the body weight
3
52
running is ___ times the body weight
4.5+
53
what mob of hip increases all directions
distraction
54
what does distraction increasee
all directions
55
what mob of hip increases hip flexion
inferior glide
56
what mob of hip increases hip extension and ER
anterior glide
57
what mob of hip increases hip flexion and IR
posterior glide
58
what mob of hip increases hip abduction and ER
medial glide
59
what mob of hip increases hip adduction and IR
lateral gldie
60
what does lateral glide increase
hip adduction and IR
61
what does medial glide increase
hip abduction and ER
62
what does posterior glide increase
hip flexion and IR
63
what does anterior glide increase
hip extension and ER
64
what does inferior gide increase
hip flexion
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