Sleep Disorders

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Types

Sleep disorders are classified into three major categories: lack of sleep (e.g., insomnia), disturbed sleep (e.g., sleep apnea, REM sleep behavior disorder, restless leg syndrome and periodic limb movement disorder), and excessive sleep (e.g., narcolepsy).


Lack of Sleep

Insomnia is the inability to fall asleep. It is a common sleep problem that most people experience at least occasionally. When it occurs, people feel tired much of the time and often worry a lot about not getti...Read the full article