Thoracic Outlet Syndrome (TOS) is the result of pressure of a nerve bundle in the neck between the collar bone and a rib caused by a spasm of the scalenus muscle or a congenital misplacement of the muscle into the first rib. Symptoms of TOS are weakness, tingling, numbness of the arm and portion of the hand as well as heaviness of the upper extremities and headaches. In many patients …Read More