Ernest Hartmann, M.D., is Professor of Psychiatry at Tufts University School of Medicine and lectures in psychiatry at Boston University School of Medicine. He is Director at the Sleep Disorders Center at Newton Wellesley Hospital.

Dr. Hartmann's interests include sleep, dreaming, nightmares, and sleep disorders. He has developed theories to describe the continuum of consciousness from sleep, reveries to waking. He is also doing research on characterizing personality differences, and implications for mental health.

Dr. Hartmann is past president of the Association for the Study of Dreams and author of eight books, including: