Movements of the Knee Flashcards Preview

VCU Anatomy Test 2 > Movements of the Knee > Flashcards

Flashcards in Movements of the Knee Deck (10):
1

What are the 5 movements of the knee?

1. flexion
2. extension
3. internal rotation
4. lateral rotation
5. locking/unlocking

2

What muscle group primarily flexes the knee?

hamstrings

(semitendinosus, semimembranosus, biceps femoris, Sartorius, gracilis (weakly))

3

What limits knee flexion?

soft tissue between calf and thigh

4

What muscle group primarily extends the knee?

quadriceps

(rectus femoris, vastus lateralis, vastus medialis, vastus intermedius)

5

What limits extension in the knee?

cruciate (ACL, PCL) and collateral ligaments

6

What internally rotates the knee?

*tiba on femur, the point of reference for rotation of the knee is the TIBIA!*

semitendinosus, semimembranosus, sartorius, popliteus.

7

What checks internal rotation of the knee?

cruciate ligaments (ACL & PCL)

8

What externally rotates the knee?

*tiba on femur, the point of reference for rotation of the knee is the TIBIA!*

biceps femoris

9

What checks external rotation of the knee?

collateral ligaments

10

When the knee is extended while standing, the knee passively "locks" by internally rotation of the femur on the tibia (same as external rotation). In the locked position, muscles can relax without making joint too unstable. To unlock the knee, the femur externally rotates so that flexion can occur. What muscle does this?

popliteus