Examlex
Explain how the central engine powers an active nucleus or quasar.
Muscle Tone
The continuous and passive partial contraction of the muscles, or the muscle's resistance to passive stretch during resting state.
Sleep Paralysis
A temporary inability to move or speak while falling asleep or upon waking, often accompanied by hallucinations.
Narcolepsy
Sleep disorder characterized by irresistible attacks of sleep plus (1) cataplexy or (2) recurrent intrusions of elements of rapid eye movement (REM) sleep into the transition between sleep and wakefulness.
Sleep Restriction
A method used in the treatment of insomnia, which involves limiting the amount of time spent in bed to the actual time spent sleeping to increase sleep efficiency.
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