pulled up by the scalene muscles and is held in spasm by the scalene muscles subsequently. The brachial plexus of nerves which exits the neck and enters the arm is often trapped in the scalene ...

Thoracic outlet syndrome occurs when there is nerve compression at the superior ... bundle that passes between the anterior scalene and middle scalene muscles. There is some degree of variability ...

Ninety-five percent of cases of TOS are due to compression of the nerves to the arm (called neurogenic TOS ... The symptoms are due to scar tissue formation in neck muscles (called scalene muscles).

Background Thoracic Outlet Syndrome (TOS) is a syndrome involving compression at the thoracic inlet, which is known clinically as the superior thoracic outlet resulting from excess pressure placed on ...