The patient is tested best when relaxed in the sitting position beside the clinician. The patient will be in either a sitting or standing position. The clinician holds the patient’s upper extremity at 90 degrees of abduction, with the patient’s forearm over the clinician’s shoulder and elbow extended. The clinician uses one hand to apply an inferiorly and slightly anteriorly directed force while the other hand palpates the edge of the acromion and the humeral head to feel for displacement anteriorly and inferiorly.
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