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.
1 They are usually conducted to estimate the prevalence of the outcome of interest for a givenâ¦. 2  Basic Tenets of the Biological Perspective in Psychology The biological perspective in psychology focuses on how physiological and genetic factors influence behavior.