In Brain Lock, Jeffrey M. Schwartz, M.D., presents a simple four-step method for overcoming OCD that is so effective, it's now used in academic treatment centers throughout the world. Proven by brain-imaging tests to actually alter the brain's chemistry, this method doesn't rely on psychopharmaceuticals. Instead, patients use cognitive self-therapy and behavior modification to develop new patterns of response to their obsessions. In essence, they use the mind to fix the brain.