AP PSYCHOLOGY

Detailed explanation-1: -In stage III sleep, which represents moderate to deep sleep, the number of spindles decreases, whereas the amplitude of low-frequency waves increases still more.

Detailed explanation-2: -View Source, stage 3 slow-wave sleep represents the deepest sleep of the sleep cycle, when brain waves are at their slowest in frequency and highest in amplitude. REM: As the name suggests, your eyes move quickly beneath your eyelids during REM sleep. Your brain activity is similar to that of a person who is awake.

Detailed explanation-3: -While the first two stages of the sleep-wake cycle are classed as light sleep, the third stage is much deeper 1. Deep sleep is sometimes known as ‘slow-wave sleep’ because of the long, slow delta waves produced by our brains during these final two sleep stages 5.

Detailed explanation-4: -Deep, slow brain waves known as delta waves begin to emerge during NREM stage 3 sleep-a stage that is also referred to as delta sleep. This is a period of deep sleep where any noises or activity in the environment may fail to wake the sleeping person. During this deep sleep stage, your body starts its physical repairs.

Detailed explanation-5: -Stages 3 and 4, Slow-Wave Sleep Sleep stages 3 and 4 are collectively referred to as slow-wave sleep (SWS), most of which occurs during the first third of the night. Each has distinguishing characteristics. Stage 3 lasts only a few minutes and constitutes about 3 to 8 percent of sleep.