Spectrum disorders are neurological and developmental disorders that affect how a person interacts, communicates, learns, and behaves. There is no known cause of spectrum disorders but it is thought that genetics and environment play a role in their onset. Although chiropractic cannot claim to be a cure, it does an excellent job of increasing quality of life. Chiropractic can help people relieve mental and physical stress by down-regulating the sympathetic nervous system. This also increases adaptability, affects hormone balance, decreases pain, and increases flexibility.