Biological Rhythms, Mood Disorders, Light Therapy, and the Pineal Gland combines the experience of psychiatric clinicians, psychiatric residents, medical students, endocrinologists, psychoimmunologists, neurobiologists, neuroanatomists, and other health professionals to present the most recent progress made in the study of the pineal gland and its relationship to mood disorders, including * major depressive disorders* winter depression* bipolar disorders* premenstrual syndrome (PMS)* sleep disorders The use of bright light to treat these disorders is also discussed.