Final answer:
Sleepwalking, night terrors, and restless leg syndrome are examples of parasomnias, which are unwanted, disruptive sleep activities or experiences during NREM or REM sleep.
Step-by-step explanation:
Sleepwalking, night terrors, and restless leg syndrome are all examples of parasomnias. A parasomnia is characterized by unwanted, disruptive motor activity or experiences during sleep, which can occur during either REM or NREM sleep phases. These sleep disorders include a variety of unusual behaviors ranging from walking during sleep to sensations in the legs that disturb sleep. Specifically, sleepwalking typically occurs during NREM sleep and involves complex behaviors while the individual is asleep. Night terrors can cause intense fear and screaming without the sufferer retaining any memory of the event. Restless leg syndrome is identified by uncomfortable sensations in the legs when trying to fall asleep, which are alleviated by movement.