1. Introduction to Circadian Rhythms, Clocks and its Genes -- 2. Oxidative Stress and its Role in the Synchronization of Circadian Rhythms in Crustaceans, an Ecological Perspective -- 3. Control of Rest: Activity Behavior by the Central Clock in Drosophila -- 4. Biological Rhythmicity in Subterranean Animals, a Function Risking Extinction? -- 5. Avian Circadian Organization -- 6. Functional Organization of Circadian Timing System of Diurnal Primate (Marmoset) -- 7. Intracellular Calcium as a Clock Output from Suprachiasmatic Nuclei Neurons -- 8. GABAA Receptor-Mediated Neurotransmission in the Suprachiasmatic Nucleus -- 9. Network Properties in the SCN Function -- 10. Behavioral, Physiological and Neuroendocrine Circadian Rhythms during Lactation -- 11. A Time to Wake, a Time to Sleep -- 12. Chronostasis: The Timing of Physiological Systems -- 13. Circadian rhythm and Food/Nutrition -- 14. Physiopathology of Circadian Rhythms: Understanding the Biochemical Mechanisms of Obesity and Cancer -- 15. Effects of Circadian Disruption on Physiology and Pathology: from Bench to Clinic (and Back) -- 16. Circadian Dysfunction in Huntington's Disease -- 17. Is it Possible to Modify Clock Genes to Improve Health?.