An Introduction to Nervous Systems presents the principles of neurobiology from an evolutionary perspective-from single-celled organisms to complex invertebrates such as flies-and is ideal for use as a supplemental textbook. Greenspan describes the mechanisms that allow behavior to become ever more sophisticated-from simple avoidance behavior of Paramecium through to the complex cognitive behaviors of the honeybee-and shows how these mechanisms produce the increasing neural complexity found in these organisms. The book ends with a discussion of what is universal about nervous systems and what...