Arthrology day of exam

Question 1

coxa vara/genu valga
pros and cons

Answer 1

(+) increased hip abductor moment arm which allows for less muscle force to maintain stability
(+) more joint stability since humeral head more inside acetabulum
(-) increased stress on femoral neck
(-) increased risk of FAI

Question 2

coxa valga/genu varus
pros and cons

Answer 2

(+) decreased stress on femoral neck
(-) increased hip abductor strength is needed to keep stability
(-) increased chance of dislocation (poorer joint stability)

Question 3

which ulnar collateral ligament is the strongest and stiffest but most to rupture?

Answer 3

anterior band of ulnar collateral ligament

Question 4

what makes up the carrying angle of elbow and what is normal?

Answer 4

axis of humerus and axis between radius and ulna
male = 11-14
female = 13-16

Question 5

what is the primary restraint for posterolateral instability of the radius?

Answer 5

radial collateral ligament

Question 6

functions of acetabular labrum

Answer 6

1. may provide more joint stability
2. provides “seal” reduces compressive force onto articular cartilage with WB by preventing synovial fluid from leaking out

Question 7

what should you do as a PT after your patient gets a medial meniscus repair?

Answer 7

1 avoid knee flexion (~115°) in WB as that will cause stress from femoral condyle to meniscus

> WB extension ok bc that reinforces hoop stress distribution