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External Rotation Strength Test

Examination type Muscle strength, RROM
Patient & Body Segment Positioning

The patient sits on a table upright and facing the examiner.  The patient flexes both elbows to 90 degrees.

 
Examiner Position The examiner should be facing the patient with one hand on the elbow to stabilize and the other hand on the outside of the patient’s hand to provide resistance on the involved side.   
Tissues Being Tested Teres minor and infraspinatus muscles
Performing the Test While the patient’s elbows are flexed at 90 degrees, the examiner uses one hand to stabilize the elbow and the other hand to give resistance on the dorsal side of the wrist.  The patient then externally rotates against the examiner pushing the shoulder into internal rotation to provide resistance.  Repeat the test on the uninvolved shoulder and compare results.
Positive Test Sharp or dull pain with resistance; inability to externally rotate or the presence of muscle weakness
Interpretation Pain or weakness may indicate rotator cuff impingement or some tearing of the rotator cuff
Common errors in performing exam Not stabilizing the elbow or giving resistance near the elbow
Factors possibly resulting in misinterpretation Muscle fatigue and muscle soreness
Related tests Abrasion Sign, Lateral rotation lag sign
References

Thompson, C. &  Floyd, R.T. (2004). Manual of Structural Kinesiology, 15th Edition.

Magee, David J. (2002). Orthopedic Physical Assessment. Philadelphia, PA: Elsevier
Links:

http://www.usask.ca/cme/articles/fmse/index.php

http://www.nismat.org/orthocor/exam/shoulder.html
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