Back pain is the leading cause of disability worldwide and affects approximately 4 out of 5 people at some point in their life. The spine is divided into 5 sections - cervical, thoracic, lumbar, sacrum and coccyx - with different nerve involvement in the extremities and body. Back pain is one of the most common reasons for missed work days in the United States, with half of American workers experiencing back pain symptoms annually and over 180,000 workplace injuries involving back pain reported in 2010.