Capturing the current excitement in the field of invertebrate neurobiology, this timely monograph integrates all levels of invertebrate nervous systems-from neurogenetics and molecular neurobiology to neurophysiology and neuroethology. Discussions reflect the impressive diversity of invertebrates in the natural world-both model and non-model species-and illustrate not only molecular and cellular mechanisms of neural function, but also higher-level circuits and systems. An emphasis is placed on the investigation of behavior, as well as evolutionary aspects of nervous systems-the emerging "evo-neuro" field. The book also addresses the universality of brain mechanisms and cognitive features, and discusses what vertebrate systems may learn from invertebrates.