AP PSYCHOLOGY

Detailed explanation-1: -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-2: -Stage 3 sleep is also known as N3 or deep sleep, and it is harder to wake someone up if they are in this phase. Muscle tone, pulse, and breathing rate decrease in N3 sleep as the body relaxes even further. The brain activity during this period has an identifiable pattern of what are known as delta waves.

Detailed explanation-3: -In the deepest level of sleep, stage IV sleep, the predominant EEG activity consists of low frequency (1–4 Hz), high-amplitude fluctuations called delta waves, the characteristic slow waves for which this phase of sleep is named.

Detailed explanation-4: -Delta waves, which are low frequency and high amplitude, characterize slow-wave stage 3 sleep.

Detailed explanation-5: -1 Delta Waves (Up to 4 Hz) EEG delta waves are high-amplitude brain waves and are associated with deep sleep stages. The delta waves are also associated with different brain functions other than deep sleep, e.g., high frontal delta waves in awake subjects are associated with cortical plasticity.