Hip Flashcards
Torsion angle is based on what plane and is specifically what angle?
transverse, 15 degrees
The angle of inclination is based on what plane and is specifically what angle?
frontal, 125 degrees
what allows for the femur to withstand forces?
trabecular/cancellous bone
what motions does the ischiofemoral ligament limit?
ext, IR, add
what motions does the pubofemoral ligament limit?
ext, abd
what motions does the iliofemoral ligament limit?
ext, ER, add
Describe the loading at the femoral neck.
compressive loads inferiorly, tensile loads superiorly
In coxa vara, hip abductor MA ______, hip abductor force requirement ______, and hip joint reaction force ______.
increases, decreases, decreases
in coxa valga, hip abductor MA _____, hip abductor force requirement _______, and hip joint reaction force _____.
decreases, increases, increases
in a slipped femoral epiphysis in children, what occurs?
increase in shear force at the femoral head
what is normal anteversion value for children?
30-40 degrees
what is the closed pack position of the hip joint?
full extension, abduction, internal rotation
what is the open pack position of the hip joint?
30 degree flexion, 30 degree abduction, slight external rotation
Anterior tilt is to hip ______ as posterior tilt is to hip ______.
hip flexion, hip extension
pelvic elevation is to contralateral ______ as pelvic depression is to contralateral _______
abduction, adduction
forward rotation of the pelvis causes ___________
contralateral IR
backward rotation of the pelvis causes _______
contralateral ER
what occurs as compensation if you have limited hip flexion?
posterior tilt and trunk flexion
what occurs as compensation if you have limited hip extension?
anterior tilt and trunk extension
the hip is ___ weightbearing in HAT on each side.
1/3
if in neutral stance, HAT causes what?
joint compression
what occurs if you aren’t in neutral stance?
muscle contraction & joint compression
when you have limited hip abduction, what is the compensation?
pelvic elevation
name the normative values for stair climbing.
45-65 degrees
name the normative values for sit to stand.
100 degrees
name the normative values for walking.
20-30 degrees
name the normative vales for tying shoe.
120 degrees
what allows for compensation when you have limited hip flexion?
tightness of hip ligaments
when you have a bilateral hip flexor tightness on standing posture, what two things occur?
increase lordosis or anterior pelvic tilt/trunk lean
what is the primary role of the hip abductors?
to maintain a level pelvis
describe what is happening in a unilateral stance without lean.
MA increases as the COG moves over; adduction torque forms causing you to need a higher abduction force to overcome the adduction force; muscle force causes compression
in unilateral stance, what does a compensatory lean to the same side allow for?
decrease in MA, and decrease in joint compression by 1/2, decrease JRF,
what occurs during single stance stability when using a cane on the contralateral side?
decrease hip abduction force and torque by 20-40%; and decrease hip JRF
when are hip adductors functionally important?
during the swing stance phase and during squatting
holding a load on the ipsilateral side will allow for what?
hip abductor moment, decrease in need for hip abductor force and moment, decrease in JRF
holding a load on the contralateral side will allow for what?
hip adductor moment, increase in need for hip abductor force and moment, increase in JRF
what is better, non-weight bearing ambulation or toe touch (if with weak hip abductors)?
toe touch
hip flexion arthrokinematic
anterior roll, posterior glide; inferior glide >70 degrees
hip extension arthrokinematic
posterior roll, anterior glide
hip abduction arthrokinematic
lateral roll, medial glide
hip adduction arthrokinematic
medial roll, lateral glide
FIA can also cause what other two impingements?
CAM and Pincer
where do hip fractures cause breakage? (which zone)
at the zone of weakness
what is not associated with hip OA changes?
running
what patholgy is related to FAI?how can you strain your labrum?
Labral pathology; ER and ABD
what happens to the ASIS and PSIS during anterior pelvic tilt?
ASIS down, PSIS up
what happens to the ASIS and PSIS during posterior pelvic tilt?
ASIS up, PSIS down
what muscles are active in anterior tilt?
pelvic flexors, trunk extensors
what muscles are active in posterior tilt?
pelvic extensors, trunk flexors
