What truly differentiates doctors of chiropractic from any other healthcare professionals is the fact that chiropractors are the only professionals who are trained to diagnose and treat what are called spinal subluxations. The word 'subluxation' comes from the Latin words meaning 'to dislocate' (luxare) and 'somewhat or slightly' (sub). So the term 'vertebral subluxation' literally means a slight dislocation (misalignment) of the bones in the spine. Although this term was adequate in the 1800s when much was still misunderstood about the human body, today the word 'subluxation' has changed in meaning to capture the complex of neurological, structural, and functional changes that occur when a bone is 'out of place.' For this reason chiropractors usually refer to subluxations of the spine as the "Vertebral Subluxation Complex", or "VSC" for short.