Sleep disorders are problems in sleep that meet diagnostic criteria for a disorder. They include insomnia, obstructive sleep apnea, parasomnias and narcolepsy.
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The circadian rhythm is often referred to as our "body clock." It is a natural, internal process that regulates our sleep-wake cycle, body temperature, hormone production, and various physiological functions.
Sleep disorders are problems in sleep that meet diagnostic criteria for a disorder. They include insomnia, obstructive sleep apnea, parasomnias and narcolepsy.
According to a recent study, sleep spindles, which are short bursts in brain activity that happen during one sleep phase and are recorded by the EEG, may control anxiety in persons with post-traumatic stress disorder (PTSD).