Knee joint

Question 1

general characteristics of articular surfaces of the knee

Answer 1

larges surfaces and incongruents shapes

Question 2

what bone of the leg does not take part of the knee joint

Answer 2

fibula

Question 3

stability of knee depends on?

Answer 3

surrounding muscles and their tendons

ligmts connecting femur and tibia

Question 4

most important muscles that stabilize the knee joint

Answer 4

inferior fibers of vastus lateralis and medialis

Question 5

internal synovial membrane

Answer 5

lines all internal survfaces of the articular cavity tthat is not covered by articular cartilage

Question 6

functions of the quadriceps tendon, patella, patella ligmt serve in the knee capsule?

Answer 6

serve to joint capsule anteriorly

Question 7

extracapsular ligamt and menisci of the knee joint

Answer 7

patellar ligmet 
medial (tibial) collateral 
lateral (fibular) collateral 
oblique popliteal (semimembranosus expansion) 
arcuate

Question 8

intracapsular lignt and menisci of the knee joint

Answer 8

acl
pcl
menisci (medial and lateral)
transverse

Question 9

funcion of MCL? (Tibial)`

Answer 9

protects medial side of knee from being bent by stress applied ot the lateral side of knee (valgus force)

Question 10

LCL (fibular)

Answer 10

protects the lateral side from an inside bending force (varus force)

Question 11

Medial and lateral menisci

Answer 11

C-shaped cartilages) deepen the shallow tibial articular surfaces and help to prevent side-to-side rocking of the femur on the tibia. They also help to absorb shock transmitted to the knee joint.

Question 12

where ACL arise from and attach to

Answer 12

anterior part of the intercondylar region, and attach to inner surface of the femoral condyles

Question 13

where PCL arise from

Answer 13

posterior part of the intercondylar region

Question 14

function of the PCL

Answer 14

The posterior ligament therefore prevents slipping of the femur towards the tibia, for example when weight bearing on a flexed knee (like walking down stairs).

Question 15

Function of ACL

Answer 15

The anterior ligament prevents slipping during movements such as extension of the knee as when walking or kicking a ball

Question 16

function of the transverse ligmt

Answer 16

prevents the two menisci from moving apart and also ensures some degree of interaction between them

Question 17

anterior drawer test

Answer 17

Displacement of more than 6mm with a soft end point suggests a torn ACL. The reverse postero-antero forces are applied using the same positioning to test the PCL.

Question 18

oblique popliteal ligmt

Answer 18

ligament is an expanded part of the tendon of semimembranosus muscle that fuses with the joint capsule and stabilizes the posterior aspect of the joint