Jerk Test

 Jerk Test

What is Jerk Test?

What is Jerk test?

  • Jerk Test is used to check for posterior instability of the shoulder joint.

How it's Performed?

  • have the patient sit straight up with the arm forward elevated to 90 degrees and internally rotated to 90 degrees.
  • Apply an axial load to the humerus to push it posteriorly.

What does a positive Jerk Test mean?

  • positive if there is a ‘clunk’ or pain with the maneuver

Sensitivity & Specificity

  • Sensitivity: 73 %
  • Specificity: 98%

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