Knee 1

Question 1

Knee joint composition

Answer 1

Modified hinge with 2° of freedom, allowing flx/ext & IR/ER
TibioFemoral jt
Patellofemoral jt
Proximal. Tibiofibular jt

Question 2

Tibiofemoral Joint Articulation

Answer 2

Convex femoral condyles
Concave tibial condyles & menisci

Question 3

Tibiofemoral joint OPP

Answer 3

25° flexion

Question 4

Tibiofemoral CPP

Answer 4

Full ext
Tibial ER

Question 5

TibioFemoral CPP can be seen during which phase of gait and why?

Answer 5

Mid stance, stable locking of knee keeps it stable w/o use of muscles

Question 6

TibioFemoral Joint Capsular Pattern

Answer 6

Flexion>Extension

Question 7

End feels of Knee Flexion

Answer 7

Soft tissue approximation of calf & thigh
Tissue stretch can occur due to tight quad

Question 8

End feels of Knee extension

Answer 8

Firm/Capsular tissue stretch, second to stretch of joint capsule and ligament

Question 9

Tibiofemoral Joint ROM
Flex/ext

Answer 9

0 to 130-150 of flexion
5-15 beyond zero is hyperextension

Question 10

Rotation of axis during flex/ext

Answer 10

ML axis of rotation migrates with femoral condyles

Question 11

Tbiofemoral joint ROM
IR/ER

Answer 11

Increases w/ knee flexion
40-45 total rotation w/ knee flexed at 90

Question 12

Ratio of knee ER:IR

Answer 12

2:1 ER versus IR

Question 13

Position of tibial tuberosity relative to anterior distal femur during ER

Answer 13

Lateral

Question 14

Position of tibial tuberosity relative to anterior distal femur during IR

Answer 14

Medial

Question 15

Which muscles stabilize menisci?

Answer 15

popliteus and semimembranosus

Question 16

Describe the function of the “Key to the Knee!” in closed and open chain flexion

Answer 16

Popliteus unlocks the knee when flexing
Slightly IR tibia in OC
Slightly ER femur in CC

Question 17

Evolute

Answer 17

Migration of the axis for flex/ext during knee movement

Question 18

Screw home rotation of knee

Answer 18

Conjunct rotation mechanically linked to to flexion and extension

Question 19

Locking the knee into full extension requires _____

Answer 19

10° of tibial ER

Question 20

Tibial on Femoral knee extension

Answer 20

Open chain
Knee locks into extension as tibia rotates externally on fixed femur

Question 21

Femoral on Tibia knee extension

Answer 21

Closed chain
Knee locks into extension as femur rotates internally on fixed tibia

Question 22

Structures involved in screw home mechanism of extension

Answer 22

Shape of medial femoral condyles curves 30° as it approached trochlear groove
ACL tension helps pull tibia
Lateral line of pull of the quads

Question 23

Patellar femoral joints articulation

Answer 23

Convex patellar facets
Concave trochlear groove of femur

Question 23

Tibiofibular joints
Proximal and Distal articulations

Answer 23

Proximal:
Convex tibia and concave fibula
Distal:
Concave tibia and convex fibula

Question 24

Patellofemoral joint type and movements

Answer 24

Modified plane joint Superior/inferior & medial/lateral tracking

Question 25

Describe patella movement when the tibia moves on the femur

Answer 25

Patella slides relative to fixed trochlear groove of femur

Question 26

Describe patella movement when femur moves on tibia

Answer 26

Trochlear groove of femur slides relative to fixed patella

Question 27

Patellofemoral joint problems may be related to weakness of?

Answer 27

Hip muscles

Question 28

Patella acts as a fulcrum for the

Answer 28

Knee and increases quad power by 33-50%

Question 29

Facets of patella

Answer 29

Odd, Medial, Lateral located posteriorly

Question 30

Patella location during full extension

Answer 30

anterior surface of distal femur against suprapatellar fat pad Moves superiorly and lateraly

Question 31

Patella location when knee is flexed

Answer 31

Sits in intercondylar notch and contacts condyles Moves inferiorly and mediallyP

Question 32

Patella