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.
The biological perspective is one of the major approaches to doing psychological research, which is focused on the idea that behaviors have biological causes. Also known as physiological psychology or biopsychology, it has strong links with many different sciences, particularly neurology and genetics.