Biological Aspects of Behaviour focuses on those areas of psychology which overlap with the biological sciences. This concise text covers topics such as: the main research methods and findings of both human and animal behaviour genetics; evolutionary aspects of human and animal behaviour; hereditary aspects of human intelligence and mental disorders; the structure and functions of the major anatomical units of the nervous system and the brain; the behavioural and physiological properties of sleep and dreaming and psychological features of dreams; the classification of psychoactive drugs and the way drugs affect mood and states of consciousness and are used to treat behavioural disorders.