Describe the methods scientists have used to investigate how the brain works. Give examples of how studying the brain has helped us understand the relationship between brain activity and behaviour.

Biological psychology, or biopsychology, is the perspective concerned with the link between behaviour and the body, particularly the brain. Biological psychologists measure biological variables, such as physiological, anatomical, or genetic variables, and relate them quantitatively and/or qualitatively to a psychological or behavioral variable. This essay will describe some of the methods used by biopsychologists to study how the brain works and will give examples that illustrate the relationship between brain activity and behaviour….(short extract)