Sleep Flashcards
Why is sleep weird?
We don’t know exactly why we sleep or dream, but we know it’s a form of rest and rejuvenation. The brain remains active during sleep, albeit differently than when awake.
What is the relationship between sleep and memory?
Dreams are related to memory, and impaired dreaming leads to impaired memory.
What is the connection between sleep and death?
Sleep is like death in the sense that it involves a loss of consciousness, but unlike death, we wake up. Losing consciousness itself is not scary, but the idea of never waking up is.
How is sleep connected to our overall health?
Sleep affects memory, cognitive performance, nutrition/obesity, mood, and many other aspects of our health.
Do we know why we dream?
We don’t know exactly why we dream, but it has something to do with memory.
Stage 1
- The transition from wakefulness to sleep.
- Typically lasts 5-10 minutes.
- Mind is subject to hallucinations, but may also spark creativity.
Stage 2
- Light sleep.
- Typically lasts around 20 minutes.
Stage 3
- Deep sleep.
- Typically lasts 15-20 minutes.
Stage 4
Usually a repeat of Stage 2.
REM sleep
- “Rapid eye movement” occurs during dreaming.
- Not really a stage, because after the first cycle, you can go in and out of REM sleep at any time in the cycle.
- A full night’s sleep is 5-6 cycles that last about 90 minutes each.
Sleep Hygiene
A set of habits and practices that help improve the quality of sleep.
How to improve your sleep
By avoiding certain things, making the environment conducive to sleep, and following healthy habits.
Avoid caffeine, alcohol and nicotine within 4-6 hours of going to sleep.
Such substances can interfere with sleep patterns and affect the quality of sleep.
Make your bedroom sleep-friendly
A bedroom should be quiet, dark, and cool to promote restful sleep.
Before you sleep do something relaxing
Relaxing activities can help prepare the body and mind for sleep, while stressful activities can have the opposite effect.