Knee Arthokinematics

Question 1

In open chain what is moving in the tibiofemoral joint?

Answer 1

Concave tibia moving on convex femur

Roll and glide occur together

Question 2

In closed chain what is moving in the tibiofemoral joint?

Answer 2

Convex femur moving on concave tibia

Roll and glide are opposite

Question 3

What is the arthrokinematics of the tibiofemoral joint during flexion/extension during open chain exercises

Answer 3

Extension: Anterior roll, Anterior Glide
Flexion: Posterior roll, Posterior glide

Question 4

What is the arthrokinematics of the tibiofemoral joint during flexion/extension during closed chain exercises

Answer 4

Extension: Anterior roll, Posterior glide
Flexion: Posterior roll, Anterior glide

Question 5

What is the arthrokinematics of the tibiofemoral joint during lateral and medial rotation during open chain?

Answer 5

Spin movement

Tibia on femur

Question 6

What is the arthrokinematics of the tibiofemoral joint during lateral and medial rotation during closed chain?

Answer 6

Spin movement

Femur on tibia

Question 7

Where does the screw-home mechanism occur?

Answer 7

Occurs in the final 20-30 degrees of knee extension

Question 8

Which condyle stops first during the screw-home mechanism?

Answer 8

Lateral condyle

Question 9

Name the closed and open packed positions for the tibiofemoral joint, along with the capsular pattern

Answer 9

Closed: Full extension w/ER
Open: 25-30 degrees of knee flexion
Capsular Patter: Flexion > Extension

Question 10

What is the function of the patellofemoral joint?

Answer 10

Increases the angle of insertion for the quadriceps.

Increases torque producing capability of the quadriceps

Question 11

What is the open chain and closed chain motions for the patellofemoral joint?

Answer 11

Open Chain: Patella on Femur

Closed Chain: Femur on Patella

Question 12

Which direction does the patella move during flexion/extension?

Answer 12

Flexion: More distal along the femoral condyles
Extension: Moves proximal on the condyles

Question 13

What is patella alta?

Answer 13

high-riding patella

Question 14

What’s patella baja?

Answer 14

low-riding patella

Question 15

What type of joint is the proximal tibiofibular joint?

Answer 15

Plane synovial joint

Question 16

How many degrees of freedom does the the tibiofibular joint have?

Answer 16

3
Anterior/posterior
Superior/Inferior
Rotation

Question 17

Name the open/closed pack positions and the capsular pattern for the proximal tibiofibular joint?

Answer 17

Closed: Full ankle dorsiflexion
Open: 0 degrees of plantar flexion
Capsular pattern: Pain with biceps femoris muscle contraction