2898acae_ULDER_EXAMINATION_STRESS_TESTS__POSITION_OF_THE_ARM
[TESTS] Posterior Glenohumeral Instability Test [STRUCTURES INVOLVED] Assesses humeral head posterior subluxation. Place the thumb of your other hand on the anterior humeral head, using the fingers to locate the posterior glenohumeral joint. Apply a posteriorly directed force on the anterior humeral head while palpating posteriorly for any subluxation. Maintain the posterior displacement with your thumb, while using your other arm to slowly, horizontally abduct the arm to neutral. If the humeral head is actually subluxed, a sudden reduction may be felt as the arm is horizontally abducted. To fully appreciate the amount of posterior subluxation, repeat this maneuver a few times. [POSITION OF THE ARM] 
With the patient supine and relaxed, use one hand to hold the patient's arm in 90 degrees of abduction and 30 to 45 degrees of horizontal adduction.
SHOULDER EXAMINATION STRESS TESTS
POSITION OF THE ARM