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30 Cards in this Set
- Front
- Back
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On the femur, which condyle extends further distally?
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Medial condyle
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What is the average range of motion of the knee?
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0-140
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How much of flexion is produced by rolling of the femur?
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0-25
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Which compartment is the axis of rotation at the knee?
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Medial Compartment- permitted by articular laxity
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HOw much lateral and medial rotation is available at theknee?
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20 degrees lateral
15 degrees medial |
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Excessive Valgus or Vagus movement may indicate?
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Ligamentous Instability or nueromuscular control impairments
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Screw home (locking) mechanism
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Obligatory lat rotation of the tibia
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The patella follows the ?
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Tibia
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The patella is the most mobile during what movment?
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Extension
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What is the largest sesmoid bone in the body
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the patella
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Fx of patella
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reases the distance of the quads tendond and patellar tendond ligament from the axis of theknee
-acts as an anatomical pulley |
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What is the peak torque of knee flexion is?
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45-60 degrees
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What is the valgus angle
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> 185
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What is the varum angle at the knee?
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< 175
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What is the quadriceps angle?
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two lines connecting three points
ASIS Midpoint of patella Tibial tubercle |
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with increased knee flexion angles also comes?
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increased contact area
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What do the medial and lateral ligaments each look like
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M: c-shaped
L:4/5 circle |
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What does the lateral miniscus cover?
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The greater portion of the smaller tibial surface
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What area of the menisci is vascular
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Outer 1/3
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Fx of the Menisci
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Distributes weight bearing forces
improves tibiofemoral congruences Reduces friction |
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Joint Capsule
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Encloses the tibiofemoral and patellofemoral joint
provides joint stabililty secrete and absorbs synovial fluid |
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Medial Collateral Ligament
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superficial and deep portion
primary restraint to valgus and lat rotation Good blood supply- heals slowly |
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Lat collateral Ligement
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Primary restraint to varus
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ACL
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Primary restraint to anterior translation of tibia and femur
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PCL
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Primary restraint to posterior tibial translation on femur (able to withstand knee forces during flexion)
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PFJ stress increases with?
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increased knee flexion angles
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At what angle is posterior shear force the greatest while WB?
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80 -105 degrees
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which injury happens less MCL or LCL?
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LCL
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What does PFPS stand for
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Patella femoral pain syndrome
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Kellgren-Lawrence Scale
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Five grades, 0 normal to 4 severe
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