Patella Tracking Assessment

Aka: Patella Tracking Assessment, J Sign

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II. Mechanism

  1. Imbalance between vastus medialis and lateral forces

III. 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

IV. Interpretation: J-Sign

  1. Patella abruptly deviates medially on early flexion

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