The platysma changes the facial expression which plays an important role in human social behavior. In elderly people â when the skin increasingly loses its elasticity â both inner faces of the platysma form two longitudinal wrinkles on the neck.
Biological psychology is a branch of psychology that studies the physiological causes of behavior. This field is sometimes referred to as behavioral neuroscience or biopsychology.
A psychologist is someone who has at least an undergraduate degree in psychology, which is the study of the brain in terms of human behavior and personality. Psychologists work in a variety of settings with individual patients, businesses, hospitals, clinics, schools, prisons, communities, the government, the military, and many others.