PSYCH REM NREM

Question 1

how many sleep cycles we go trough

Answer 1

four or five sleep cycles.

periods of 90 minutes whereby we experience NREM and REM sleep.

Question 2

REM (Rapid Eye Movement)

Answer 2

• About 20-25% of our sleep is REM sleep.
• Dreaming is most common in REM sleep

As a sleep episode progresses, time spent in REM sleep increases
Hence why we often wake up in the middle of a dream!

Question 3

when does REM occur

Answer 3

end of each sleep cycle

Question 4

REM sleep is often described as a

Answer 4

paradoxical sleep”.

This is because in REM sleep our brain is highly active

Question 5

NREM

Answer 5

-3 stages
75-80$ of sleep is in nrem
-nrem increases as sleep progresses
-dreams can occur in nrem -less vivid

Question 6

3 stages of NREM

Answer 6

1. entry point into sleep, light sleep, last 2-10 min
2. deeper, 20-30, lengthens as sleep episode progresses
3. deepest, 20-40 min but decreases as progresses