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Narcolepsy is a disabling neurological disorder of sleep regulation that affects the control of sleep and wakefulness. It may be described as an intrusion of the dreaming state of sleep (called REM or rapid eye movement sleep) into the waking state. Symptoms generally begin between the ages of 15 and 30. The four classic symptoms of the disorder are excessive daytime sleepiness; cataplexy (sudden, brief episodes of muscle weakness or paralysis brought on by strong emotions such as laughter, ange...

Sleep disturbances occur in about 12% to 25% of the general population [1] and are often associated with situational stress, illness, aging, and drug treatment.[2,3] It is estimated that 45% of people with cancer have sleep disturbance.[4] Physical illness, pain, hospitalization, drugs, and other treatments for cancer, and the psychological impact of a malignant disease may disrupt the sleeping patterns of persons with cancer. Poor sleep adversely affects daytime mood and performance. In the gen...


Narcolepsy as related to Sleep Disorders