Circadian Physiology highlights the basic processes and latest research findings in circadian biology and describes how this knowledge applies to the prevention of jet lag and the malaise associated with shift work, the treatment of sleep disorders and depression, and the timing for effective administration of medicines. The second edition is updated to include recent research developments such as the discovery of new retinal photoreceptors, the identification of several non-hypothalamic circadian pacemakers, and the elucidation of genomic and proteomic mechanisms of biological timing. Each chapter includes a summary, exercises, and suggestions for further reading.