Patella Tracking Assessment


Patella Tracking Assessment, J Sign

  • Mechanism
  1. Imbalance between vastus medialis and lateral forces
  • Technique
  1. Knee exposed for observation
  2. Positioning
    1. Performs a single leg squat and stand or
    2. Lies supine with knee extended from flexed position
  • Interpretation
  • J-Sign
  1. Patella abruptly deviates medially on early flexion