AC Shear Test

Hi, I'm Doctor Jo, a licensed Physical Therapist and Doctor of Physical Therapy. I hope you enjoy my video demos of stretches & exercises for common injuries and syndromes. Be safe. Have fun. And I hope you feel better soon.

The AC Shear Test is used on the AC (acromioclaviular) joint. This is where the clavicle and the acromion come together. If the joint is sprained or separated, it can cause a lot of pain and dysfuntion in the shoulder.

The test can yield both false positives & false negatives, so use it in combination with other diagnostic tools.

To test it, place each palm of your hand around the joint. One over the clavicle, and the other over the spine of the scapula, and then squeeze together. Pain and instability indicate a positive test. However, pain can also be positive for other issues including shoulder bursitis, tendonitis, or a rotator cuff issue.

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