Some physicians further subdivide nTOS patients based on where the brachial plexus becomes impinged. 4 Those who advocate this philosophy distinguish impingement between the scalene muscles as an ...

Adson’s sign or Adson’s maneuver is used to diagnose thoracic outlet syndrome. The clinician has the patient extend their neck and turn their head to the side that is being tested.

In the subject represented, a cervical rib, heavy scalenus minimus muscle and wide scalenus anterior muscle are all present, ... the artery is squeezed by the tensed scalene muscles.