Patella Femoral Kines

Front 1

what is the most valid assessment of abnormal patellar biomechanics

Back 1

dynamic mri

Front 2

The angle of knee flexion where the patella is most stable in the groove is

Back 2

45 degrees

Front 3

Describe the normal movement of the patella in the frontal plane as the knee moves from flexion to full extension (the femur is stable and the foot free to move (ie. open chain movement)?

Back 3

. The patella starts laterally and moves medially and then again laterally in a C shape

Front 4

All of the following can increase the dynamic Q angle EXCEPT:
a. internal tibial rotation
b. internal femoral rotation
c. external tibial rotation
d. knee valgus

Back 4

a

Front 5

Describe the kinematics of the patello-femoral joint during the closed chain movement from knee flexion to extension?

Back 5

a. The femur rotates internally underneath the patella

Front 6

Diminished VMO activity is the primary common cause of patello- femoral pain.
a. true
b. false

Back 6

b

Front 7

Describe an exercise program would be the best choice for your patient with patello-femoral pain?

Back 7

There can be a variety of answers, should involve closed chain and training of the hip
Hip abduction and hip external rotation

Front 8

According to Dr. Powers, what (is) are likely causes of abnormal patellar tracking?
a. Inadequate Vastus medialis muscle firing
b. Muscle imbalance of the quads
c. Tightness of the iliotibial band
d. Trochlear dysplasia
e. All of the above

Back 8

d

Front 9

. In open chain, contraction of the quadriceps causes the patella to translate in what directions?

Back 9

superior, lateral, posterior

Front 10

. What is the problem with measuring the Q angle with the patient lying on the table?

Back 10

It is taken statically and does not predict dynamic function

Front 11

The muscle which has the strongest torque producing capability collectively in extension, abduction and external rotation is the

Back 11

glut max

Front 12

which trochlea is bigger

Back 12

lateral

Front 13

which part of the trochlear groove is more shallow

Back 13

proximal/superior

Front 14

what is the q angle

Back 14

physiologic valgus, where hips are wider than the knees
angle between the quads fibers and the patella tendon
the offset of these two creates a net lateral force vector
the larger the q angle the greater the lateral force

Front 15

contraction of the quads pulls the patella...

Back 15

superior, lateral, and posterior into compression

Front 16

as you move into knee extension, what is the patella doing

Back 16

patella moves medial, then lateral, then medial

Front 17

when are you more likely to sublux the patella

Back 17

during knee extension and medial rotation of the femur on a planted tibia/fibula

because as you go into knee flexion the sulcus angle increases (the trochlear groove gets deeper). the patell is getting pulled into the deeper part of the groove

Front 18

explain what causes the subluxation of the patella during WB and nonWB

Back 18

during WB the femur is moving under the fixed patella (fixed to the tibia)

during nonWB the patella moves on the fixed femur

Front 19

why is glut max a tri planar muscle

Back 19

it does extension, abduction, and ER