Includes bibliographical references and index.

1. Introduction -- 2. Sleep physiology -- 3. Extent and health consequences of chronic sleep loss and sleep disorders -- 4. Functional and economic impact of sleep loss and sleep-related disorders -- 5. Improving awareness, diagnosis, and treatment of sleep disorders -- 6. Ensuring adequate diagnosis and treatment : access, capacity, and technology development -- 7. Opportunities to improve career development in somnology -- 8. Bolstering somnology and sleep disorders research programs -- 9. Building sleep programs in academic health centers -- App. A. Study process -- App. B. Acronyms -- App. C. Glossary of major terms -- App. D. Congressional language establishing the National Center on Sleep Disorders research, section 285b-7 -- App. E. Sleep disorders research advisory board membership -- App. F. National institutes of health sleep-related initiatives : 1994-2004 -- App. G. National institutes of health support of sleep-related R01 grants -- App. H. Summary of NIH support of sleep-related career development awards -- App. I. Summary of NIH support of sleep-related R13, R25, P, F, T, and U grants -- App. J. Summary of investment in sleep-related projects at the top 30 NIH-funded institutions -- App. K. Biographical sketches of committee members and staff.