Roos Test (See picture appendix 5): This test will be used to screen interested participants during the recruitment phase. The patient stands and abducts the arms to 90 degrees, externally rotates the shoulder and flexes the elbows to 90 degrees. The patient is then directed to open and close the hands slowly for three minutes. A positive test will cause increased symptoms such as ischemic pain, heaviness or profound weakness of the arm or numbness and tingling of the hand. Minor fatigue is considered a negative test. (Magee DJ, 2008) Positive findings indicate compression of the neurovascular bundle specific to structures in the thoracic outlet.