Original Editor - Derek Little
This test is used to detect posteroinferior instability of the Glenohumeral joint.
While stabilizing the patient’s scapula with one hand and holding the affected arm at 90° abduction and internal rotation, the examiner grasps the elbow and axially loads the humerus in a proximal direction.The arm is moved horizontally across the body. A positive result is indicated by a sudden clunk as the humeral head slides off the back of the glenoid. When the arm is returned to the original position, a second jerk may be observed, that of the humeral head returning to the glenoid.
A systematic review of the validity and accuracy of clinical tests used to detect labral pathology of the shoulder showed the +LR of the Jerk Test to be LR 34.71 and the -LR to be 0.27
- Kim et al. Painful Jerk Test:& A Predictor of Success in Nonoperative Treatment of Posteroinferior Instability of the Shoulder.& Am J Sports Med 2004 32: 1849
- Physiotutors. Jerk Test | Posteroinferior Labral Tear. Available from: https://www.youtube.com/watch?v=j_qG1MNOws8
- Munro et al. The validity and accuracy of clinical tests used to detect labral pathology of the shoulder--a systematic review. Man Ther. 2009 Apr;14(2):119-30