Chiropractic is a branch of the healing arts based upon the understanding that good health depends upon a normally functioning nervous system. "Chiropractic" comes from a Greek word chiropraktikos, meaning "effective treatment by hand". Chiropractic stresses the idea that the cause of many disease processes begins with the body's inability to adapt to its environment. It looks to address these diseases not by the use of drugs and chemicals, but by locating and adjusting the musculo-skeletal area of the body, to see which areas are functioning improperly.