PSYCHOLOGY OF EMOTIONS

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 environmental noises or activity may fail to wake the sleeping person.

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: -Stage I sleep is also referred to as drowsiness or presleep and is the first or earliest stage of sleep. Representative EEG waveforms are shown in the images below.

Detailed explanation-4: -What happens to NREM-3 sleep as the night goes on? Gets briefer then disappears. How much of an average night’s sleep do we spend in REM? 20-25% of night’s sleep.