What is it?
As a result of trauma (a bodily injury or wound caused by an external force), inflammation, or tumours to the nerves which originate near the neck and shoulder. Stretching or tears of the nerves at their spinal origin (where they exit the spinal column) are most commonly seen during high speed vehicle accidents, particularly involving motorcyclists, falls from heights but also at birth, when the baby’s shoulder gets pulled away from the head.