Why We Sleep
May 16, 2020

This book taught me a lot about the activity that everyone just takes for granted. It’s more important to understand what a lack of sleep will do to your health than the benefits.

Sleep is the single most effective thing we can do to reset our brain and body health each day.

After a full night of sleep, the prefrontal cortex - the rational brain - is fully connected to the amygdala - the emotional brain.

The best bridge between despair and hope is a good night’s sleep.

During sleep, the brain cleans itself using the cerebrospinal fluid that bathes the brain. When we wake up in the morning, our brains can once again function efficiently thanks to this deep cleansing.

Sleep fights against infection and sickness by strengthening the immune system and also increases Testosterone.

What a lack of sleep does to you

Slowing down in reaction time, sometimes stopping responding altogether.

Impaired performance, lower alertness, and reduced energy levels.

Poor decision making, impulsive, uncontrolled, addictive behavior.

We forget important stuff and do not learn anything.

Causes dementia, Alzheimer’s, cancer, diabetes, obesity, hypertension, and cardiovascular disease.

Reproductive hormones, reproductive organs, and the very nature of physical attractiveness all are degraded by short sleeping.

The brain does not sleep when you are sleeping. It is wide awake and active.

Sleep Loss = Brain Drain.

Cripples Thinking.

Hurts attention, executive function, immediate/working memory.

Puts you in a bad emotional state.

Damages quantitative skills, logical reasoning ability.

Hurts Mathematical thinking.

Hurts manual dexterity, including fine motor control.