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.
People like Sigmund Freud popularized the psychodynamic approach, and still others will focus on sociocultural influences to explain mental processes and behavior. The focus of this lesson will be on a different approach from all of these, one that most people don't initially associate with psychology: biology. The biological approach to psychology is one way to conceptualize and explain the human experience. The biological approach seeks to explain mental processes and behavior by focusing on the function of the nervous system at the cellular and structural level.