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.
A psychologist is someone who studies the mind and behavior. While people often think of talk therapy when they hear the word psychologist, this profession actually encompasses a wide range of specialty areas including such things as animal research and organizational behavior.