This is a clinical test looking for shoulder impingement (pinching of rotator cuff tendons).  To perform the test, the patients arm is held straight out in front of them by the examiner.  The examiner takes the hand from palm up to palm down, and then raises the arm over the patient’s head.  The examiner holds on to the patient’s shoulder blade (called the scapula) to stabilize it. Pain with this maneuver is a sign of subacromial impingement.