Sleep is the physiological process whereby the brain achieves rest. The reason for the body’s need for sleep is not fully understood. Sleep symptoms include insomnia (difficulty falling asleep and/or difficulty staying asleep), sleepiness/drowsiness, sleep attacks, somnolence, and other symptoms. Sleep disorders include Obstructive Sleep Apnea (OSA), Chronic Insomnia, Narcolepsy, and many others.

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