Sleep paralysis is a condition where an individual experiences the inability to move when waking up or falling asleep. It is a phenomenon closely associated with the sleep-wake cycle and is also known as "isolated sleep paralysis" or "nighttime paralysis." Other synonyms for sleep paralysis include "REM atonia," "sleep atonia," "nocturnal atonia," and "hypnopompic paralysis." It is important to note that sleep paralysis is not a specific disorder but a symptom of several underlying sleep-related disorders. Some common causes of sleep paralysis include narcolepsy, sleep apnea, and REM sleep behavior disorder. Treatment for sleep paralysis involves identifying and treating the underlying cause, improving sleep hygiene, and practicing relaxation techniques.