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Jerk Test (Two Angles)

Jerk Test

Jerk Test (Lateral View)

Name
Purpose1,2
Description2
Sensitivity, Specificity
DOR
Reliability Validity
Likelihood Ratio +/-
Jerk Test
Tests for posterior instability/ torn posterior or posteroinferior labrum.
 With the patient seated the examiner grasps the elbow with one hand and the scapular with the other and elevates the patient’s arm to 90° of adduction and internal rotation. Following this the examiner provides an axial compression load to the humerus through the elbow maintaining the horizontally abducted position. The compression force is maintained as the examiner moves the arm into horizontal adduction. A positive test is indicated by sharp pain in the shoulder with or without a clicking sound
Sensitivity=
733
Specificity=
983
 
135.193
 
 
LR+ =
36.53
LR- =
0.273

1.       Magee DJ.  Orthopedic Physical Assessment. 5th ed. St. Louis, MO: Saunders Elsevier; 2008.
2.       Cook CE, Hegedus EJ. Orthopedic physical examination tests: An evidence-based approach. Upper Saddle River, NJ: Pearson prentice Hall; 2008.
3.       Kim SH, Park JS, Jeong WK, Shin SK. The Kim test: a novel test for posteroinferior labral lesion of the shoulder-a comparison to the jerk test. Am J Sports Med.2005; 33:1188-1192.
4.