Acromioclavicular Resisted Extension Test

Testing position: The patient is seated or standing, upper limb elevated 90 degrees in the sagittal plane, the elbow flexed to 90 degrees, and internal rotation to 90 degrees. The examiner's hand is placed against the posterior elbow, the patient extends the shoulder in the transverse plane, meeting the examiner's resistance.
Expected Findings: The test is considered positive if pain is experienced in the acromioclavicular joint.