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 ...

The symptoms are due to scar tissue formation in neck muscles (called scalene muscles). In neurogenic TOS, the symptoms are pain, numbness, tingling, and/or weakness in the arm and hand. Also common ...

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 ...