context: A sleep defect combines a group of sleep disorders that are usually associated with hypersomnia or lack of sleep. These disturbances include abnormal physical movements, such as talking and screaming and imagining perceptions and dreams (such as nightmares) that do not exist at the beginning of sleep or drowsiness, during sleep or when waking up. Most sleep disorders occur during separate sleep states, which are partial symptoms during the transition from wakefulness to REM sleep, or from awake to REM sleep.
question: What is the sleep defect?
answers.text: a group of sleep disorders that are usually associated with hypersomnia or lack of sleep