AT 2300 Knee/patellofemoral/hip exam- Quizzes
with Complete Solutions
True or False: the knee is more stable when the extremity is weight bearing than when it is
not
True
what are the three degrees of freedom of the tibiofemoral joint?
flexion and extension, internal and external rotation, and abduction and adduction
what are the four motions that the ACL serves as a static stabilizer against?
1. anterior translation of the tibia on the femur
2. internal rotation of the tibia on the femur
3. external rotation of the tibia on the femur
4. hyperextension of the tibiofemoral joint
The PCL provides restraint against what two movements?
posterior displacement of the tibia on the femur and external tibial rotation
What occurs between the ACL and PCL during the screw home mechanism?
They wind upon each other in flexion and unwind in extension
6 functions of the menisci
1. deepen articulation and fill the gaps that normally occur
2. improve lubrication for the articulating surfaces
3. provide shock absorption
, 4. increase passive joint stability
5. limit the extremes of flexion and extension
6. serve as proprioceptive organs
which quadriceps muscle also serves as a hip flexor?
rectus femoris
which quadriceps muscle pulls the patella medially during knee extension
VMO
what does the deep layer of MCL attach to?
medial meniscus
which is the longest ligament in the knee?
MCL
At which ranges of motion does the LCL protect against varus forces?
full extension and up to 30° of flexion
primary MOI for a PCL tear
falling on a flexed knee
blood supply to the menisci occurs through ________
diffusion
how does the popliteus assist the PCL
it assists in the prevention of posterior displacement of the tibia
with Complete Solutions
True or False: the knee is more stable when the extremity is weight bearing than when it is
not
True
what are the three degrees of freedom of the tibiofemoral joint?
flexion and extension, internal and external rotation, and abduction and adduction
what are the four motions that the ACL serves as a static stabilizer against?
1. anterior translation of the tibia on the femur
2. internal rotation of the tibia on the femur
3. external rotation of the tibia on the femur
4. hyperextension of the tibiofemoral joint
The PCL provides restraint against what two movements?
posterior displacement of the tibia on the femur and external tibial rotation
What occurs between the ACL and PCL during the screw home mechanism?
They wind upon each other in flexion and unwind in extension
6 functions of the menisci
1. deepen articulation and fill the gaps that normally occur
2. improve lubrication for the articulating surfaces
3. provide shock absorption
, 4. increase passive joint stability
5. limit the extremes of flexion and extension
6. serve as proprioceptive organs
which quadriceps muscle also serves as a hip flexor?
rectus femoris
which quadriceps muscle pulls the patella medially during knee extension
VMO
what does the deep layer of MCL attach to?
medial meniscus
which is the longest ligament in the knee?
MCL
At which ranges of motion does the LCL protect against varus forces?
full extension and up to 30° of flexion
primary MOI for a PCL tear
falling on a flexed knee
blood supply to the menisci occurs through ________
diffusion
how does the popliteus assist the PCL
it assists in the prevention of posterior displacement of the tibia
