BIOLOGICAL BASES OF BEHAVIOR
BIOLOGY OF CONSCIOUSNESS
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Detailed explanation-1: -Stage 1, also called N1, is essentially when a person first falls asleep. This stage normally lasts just one to seven minutes. During N1 sleep, the body has not fully relaxed, though the body and brain activities start to slow with periods of brief movements.
Detailed explanation-2: -Stage 2. The first two sleep phases are typically considered light sleep. You’ll spend around half the night in stage two. This acts as an extension of the first stage of your natural sleep cycle, and your breathing, eye movement, heartbeat and muscle activity will continue to slow down 3.
Detailed explanation-3: -Stage 1: Your eyes are closed, but it’s easy to wake you up. This phase may last for 5 to 10 minutes. Stage 2: You are in light sleep. Your heart rate slows and your body temperature drops.
Detailed explanation-4: -As you sleep, your body cycles through non-REM and REM sleep. You usually start the sleep cycle with stage 1 of non-REM sleep. You pass through the other stages of non-REM sleep, followed by a short period of REM sleep. Then the cycle begins again at stage 1.
Detailed explanation-5: -Stage 1: Non-REM sleep Stage 1 occurs when you first fall asleep. As your body enters light sleep, your brain waves, heart rate, and eye movements slow down. This phase lasts for about 7 minutes.