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.
Only sleep when you are truly tired
Trying to force oneself to sleep can lead to frustration and anxiety. Getting up and doing something else can be helpful.
Get sun exposure during the day and avoid bright lights in the evening
Sunlight exposure helps regulate the body’s internal clock, while bright lights in the evening can disrupt it.
Try to follow a consistent wake/sleep schedule
Establishing consistent sleep and wake times can help regulate the body’s internal clock.
Don’t eat big meals close to bedtime
Eating a large meal close to bedtime can interfere with digestion and disrupt sleep.
Have the right amount of fluids before you sleep
Consuming too little or too much fluid before bed can interfere with sleep quality.
If you exercise, exercise early in the day
Morning exercise can help improve sleep, while evening exercise can have the opposite effect.
Use your bed only for sleep
Using the bed only for sleep can help the brain associate the bed with sleep and relaxation.
Limit naps during the day to less than 30 min
Long naps can interfere with the body’s natural sleep rhythm and make it difficult to sleep at night.
Consume food that promotes sleep
Some foods, such as those high in melatonin and prebiotics, can promote sleep without the risks associated with medication.