Chiropractic, which celebrated its centennial in 1995, is a curious mixture of science and pseudoscience, sense and nonsense. Much of it is based on the theory that misaligned spinal bones produce nerve interference that causes disease. Many chiropractors claim that correcting these misalignments ("subluxations") can restore health and that regular spinal adjustments are essential to maintain it.

Inside Chiropractic: A Patient's Guide (ed. 1999)