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.
What They Do. Biological psychologists who have earned a doctorate are frequently employed as researchers. They conduct research on diverse topics such as the evolution of the brain, the interactions between different bodily systems and the brain, and the biological reasons behind motivation.