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10 Common Symptoms of Sleep Disorders


Updated February 24, 2014

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Sleep paralysis

The inability to move when transitioning from sleep to wakefulness is called sleep paralysis. The affected person is awake but unable to move as the muscles remain paralyzed. When sleep paralysis occurs as part of four cardinal symptoms, it may suggest narcolepsy. However, it also occurs commonly in healthy people, especially in periods of stress.

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