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.
Defining Biological Psychology. Alternative names of biopsychology, such as behavioral neuroscience and physiological biology, indicate a preliminary definition. Researchers in this field examine not only how biology - particularly the nervous system - affects behavior, but also how behaviors affect the brain.