Psychiatry is a branch of medicine that deals with the diagnosis and treatment of mental disorders. It takes a holistic approach to medicine and incorporates subjects like general medicine, neurology, behavioral sciences, psychology, sociology, and anthropology. The objectives of studying psychiatry and behavioral sciences include understanding human behavior, applying psychological concepts to holistic medical practice, and utilizing a biopsychosocial model of health and illness. Students learn about topics like development across the lifespan, stress and personality, psychological factors in illness and treatment, and cultural influences on health and healthcare.