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%