The first rib is not down in the chest wall as one would think, but is actually closer to the neck and is the base for a group of muscles called the scalenes. The scalenes are important muscles ...

Thoracic outlet syndrome occurs when there is nerve compression at the superior thoracic outlet caused by pressure on a neurovascular bundle that passes between the anterior scalene and middle ...

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 ...