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.
Biological psychology deals with organic psych â¦ ological processes, such as what specific neurons do, what parts of the brain do, and what happens during specific biological events-such as drug usage or brain trauma. Abnormal psychology studies behavior that is abnormal in a particular context.