<unk>  is a condition characterized by temporary<unk>  of the body shortly after waking up (known as hypnopompic<unk>  or, less often, shortly before falling asleep (known as hypnagogic<unk> .
Physiologically, it is closely related to the<unk>  that occurs as a natural part of REM (rapid eye movement) sleep, which is known as REM atonia.<unk>  occurs when the brain awakes from a REM state, but the bodily<unk>  persists. This leaves the person fully aware, but unable to move. In addition, the state may be accompanied by hypnagogic hallucinations.
More often than not,<unk>  is believed by the person affected by it to be no more than a dream.[citation needed] This explains many dream recountings which describe the person lying frozen and unable to move. The hallucinatory element to<unk>  makes it even more likely that someone will interpret the experience as a dream, since completely fanciful, or dream-like, objects may appear in the room alongside one's normal vision.
Sleep paralysis
Sleep Apnea
Presyncope
Sedation
Sleep disorders
Sleep disorder
Syncope
Somnolence