Final answer:
Sleepwalking, talking in sleep, and bedwetting mainly occur during NREM stage 3 of sleep, characterized by low frequency, high amplitude delta waves, and known as deep or slow-wave sleep.
Step-by-step explanation:
Sleep Stages and Parasomnias
Behaviors such as sleepwalking, talking in sleep, and bedwetting are typically associated with the NREM sleep stages, particularly with stage 3, also known as deep sleep or slow-wave sleep.
This stage is characterized by low frequency, high amplitude delta waves. It is during this time that parasomnias such as sleepwalking and night terrors most frequently occur.
While sleepwalking might sometimes happen in other stages, it is most common in stage 3 due to the depth of sleep and the type of brainwaves present.
In contrast, REM sleep is associated with dreaming and is usually not the stage during which sleepwalking occurs, as the body's muscles, except those that control breathing and circulation, are paralyzed.