Knee Joint Flashcards Preview

Hugh's MD1 Musculo-Skeletal > Knee Joint > Flashcards

Flashcards in Knee Joint Deck (32)
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1

What is the unhappy triad?

Medial collateral ligament

Medical meniscus

ACL

1

Why is the white zone of the menisci white?

It's avascular

2

What is contained in the intercondylar notch?

The ACL

2

Which tendons reinforce the capsule medially?

The pes anserinus

2

Which movements does the ACL resist?

Femur posterior in relation to the tibia

Tibia anterior in relation to the femur

3

When is the patella more likely to be pulled laterally?

When the vastus medialis is weak

4

Which bones articulate in the knee joint?

Femur-Patella

Femur-Tibia

5

Is the patella inside or outside the knee joint?

Inside

5

What does the medial colateral ligament blend with?

Capsule 

Medical meniscus

6

Which structures constitute the pes anserinus?

Sartorius

Gracilis

Bursa

Semi-Tendinosus

(Say grace before tea)

7

What is the name of the muscle required for initiation of unlocking?

Popliteus

8

Are the ligaments tight in extension or flexion?

Extension

10

What is Baker's Cyst?

Inflammation of the bursa deep to the popliteus muscle

11

What are the three support structures at the knee joint?

The collateral ligaments

The cruxiate ligaments

The menisci

11

What is the origin and insertion the ACL?

Anterio-medial aspect of tibia to the posterio-lateral aspect of the femur

13

Which ligament is at risk in a bumper bar impact (where the tibia is impacted on)

PCL

14

What is the function of the menisci?

Shock absorption

Weight distribution

16

Which movement does the PCL resist?

Tibia posterior in relation to the femur

Femur anterior in relation to the tibia

17

In what position can rotation occur?

Flexion

 

19

Why isn't the lateral collateral ligament damaged as much?

It's separated from the meniscus by the popliteus muscle

20

Whhen is the ACL at particular risk?

When a laterally rotating force is apply against the passive locking medial rotation of the femur

20

What is the origin and insertion of the PCL?

Posterio-lateral aspect of tibia to the anterio-medial aspect of femur

21

How does the articular surfaces of the femur and tibia differ?

The femur has a rounded condyle while the tibia has a flat plateau

23

Which condyle of the femur is longer?

The medial one

24

Around what axis does the femur lock and unlock?

ACL

26

What is useful about the suprapatella bursa?

Expansion of it is a clinical sign of effusion of synovial fluid

 

Infectious material can enter the joint through it

27

What is the direction of pull of the popliteus?

Pulls the femur from tibia

28

Which movements does the medial collateral ligament resist?

Abduction and lateral rotation of the tibia

Anterior displacement of tibia

29

Are the menisci and cruciate ligament intrasynovial and intracapsular?

No, only intracapsular

30

Which menisci is more commonly injuried?

Medial

31

What knee position is valgus?

Force on the lateral side of the knee and feet outwards

Knocked knees

32

What knee position is varus?

Force on the knee medially

Feet are inwards

Bow legged