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Introduction to Sleep and Wakefulness Disorders

By Karl Doghramji, MD, Professor of Psychiatry, Neurology, and Medicine and Medical Director, Jefferson Sleep Disorders Center, Thomas Jefferson University

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(See also Obstructive Sleep Apnea; for sleep problems in children, see Sleeping in Infants and Children.)

Almost half of all people in the US report sleep-related problems. Disordered sleep can cause emotional disturbance, memory difficulty, poor motor skills, decreased work efficiency, and increased risk of traffic accidents. It can even contribute to cardiovascular disorders and mortality.