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.
Learner's definition of PSYCHOLOGY. 1. [noncount] : the science or study of the mind and behavior. She studied psychology in college. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. 2. : the way a person or group thinks. [noncount]. the psychology of an athlete.mob psychology.earner's definition of PSYCHOLOGY. 1. [noncount] : the science or study of the mind and behavior. She studied psychology in college. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. 2. : the way a person or group thinks. [noncount]. the psychology of an athlete.