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.
Neuropsychology (biological psychology) a branch of psychology concerned with the links between biology and behavior. Central nervous system. the portion of the vertebrate nervous system consisting of the brain and spinal cord. Peripheral nervous system. the sensory and motor neurons that connect the central nervous system to the rest of the body.