Dr. John J. Ratey, M.D., is an associate clinical professor of psychiatry at Harvard Medical School and has a private practice in Cambridge, Massachusetts.

For more than a decade he taught residents and Harvard medical students as the Assistant Director of Resident training at Massachusetts Mental Health Center. He continues to teach psychiatrists as a regular instructor in Harvard’s Continuing Medical Education program.

As a clinical researcher he has published more than 60 papers in peer-review journals in the fields of psychiatry and psychopharmacology.

He most recently authored the bestselling book, A User's Guide to the Brain: Perception, Attention and the Four Theaters of the Brain (2000) which translates how neuroscience affects emotions, behavior and overall psychology.

Since 1998 Dr. Ratey has been selected each year as one of the best doctors in America by his peers. 
Most recently, Dr. Ratey was the recipient of the 2006 Excellence in Advocacy award from the non-profit group PE4Life, for his work to promote the adoption of regular, aerobic-based physical education.