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.
In fact, the two are so closely linked that the biological approach to psychology has its own name: neuropsychology. Neuropsychologists examine mental processes and behavior using a biological approach.