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.
-contains brain, spinal cord, and other nerves and fibers. neuroscience. -study of the brain and nervous system. biological psychology. -psychology concerned with understanding how the brain and other biological systems influence human behavior.