Flashcards in knee 1 Deck (30):
What is the largest joint of the knee complex?
The tibiofemoral joint.
Name the 3 joints of the knee and what type of joint they are?
Tibiofemoral- complex joint, patellofemoral- compound joint, proximal tibiofibular- simple joint.
The knee complex is the most common site of what type of impairment?
There are large forces at what 2 joints in the knee complex and this is due to what?
Tibiofemoral and patellofemoral due to very long levers.
What is the posterior compartment of the knee and what is the anterior compartment of the knee?
Posterior- tibiofemoral joint. Anterior- Patellofemoral joint.
What are the femoral condyles like?
Egg shaped and separted by a fossa.
Will the radius of the femoral condyles be larger anterior or posterior?
What will the significance of egg shaped femoral condlyes be?
They will need a variable socket to articulate with the tibia and that is what the menisci are for.
What is conjoint rotation of the knee?
Screw home mechanism which is external rotation seen in the last few degrees of knee extension.
Conjoint rotation pivots around what?
The lateral femoral condyles during extension.
What femoral condyles have what type of angulation and why?
Posterior angulation to increase flexion and decrease extension of the knee
What will valgus and varus mean?
Valgus- distal part bent outward, knocked kneed. Varus- distal part bent inward, bowlegged.
Which femoral condyle will have the longer larger articulare surface? Why?
Medial. It allows for conjoint rotation.
The medial femoral condyle will also have a larger epicondyle, but why?
This will affect the axis of the knee.
What will the angle of the medial femoral condyle be like?
It will be more oblique than the lateral.
Which femoral condyle will extend more distally and what can this lead to?
Medial and this causes valgus of the knee.
What is the pivot point of conjoint rotation?
The shorter smaller articular surface of the lateral femoral condyle.
What will the angle of the lateral femoral condyle be like?
Less oblique A-P.
The tibial femoral rotation of the skrew home mechanism happens when?
The last 15-0 degrees of extension of the knee.
What is femoral torsion?
anetversion ( degree to which an anatomical structure is rotated forwards (towards the front of the body) or backwards (towards the back of the body) respectively, relative to some datum position)
What is the normal femoral torsion or anteversion?
What is an anteverted femur?
one rotated forward more than 20 degrees.
What will an anteverted femurs impact be on the knee?
What is a medial orentation of the the patella aka?
What is a common compensation for a anteverted femur?
What is a retroverted femur?
One that has femoral torsion or anteversion of 10 degrees or less.
What is the impact on the knee for a retroverted femur?
What is the common compensation for a retroverted femur?
What is the superior surface of the tibial condyles like?
Flat with tibial spines.