What happens to our brains when we sleep?
You may think of sleep as the time when your brain shuts down and nothing on your to-do list gets done. However, your brain is actually very active during sleep doing important things — it’s not just resting.
Learning and memory
While you sleep, your brain is busy sorting and storing information from the day. Your brain consolidates all the information it’s picked up and files it away for later use creating long term memories. Scientists explain that the brain’s trillions of nerve cells literally rewire themselves to help us process and retain new information. Your brain is making a map of the information, making new connections, and breaking other ones. If you stay up all night to cram for an exam, your brain is not going to retain the information in the same way as if you’d gone to sleep early. Your brain needs to process that information, which you really only do when you’re asleep.
Sleep also plays a housekeeping role and removes toxins and unnecessary information in your brain that builds up and clutters your nervous system. This helps you to wake up feeling refreshed (not groggy), allowing you to concentrate, problem-solve, learn, perform well, and make logical decisions.
Mood
We all know that lack of sleep affects mood and irritability; think of how grumpy you feel without enough sleep. During sleep, brain activity increases in areas that regulate emotion, supporting healthy brain function and emotional stability. The amygdala, located in the temporal lobe of the brain, is in charge of the fear response. It’s what controls your reaction when you face a perceived threat, like a stressful situation. Without sleep, the brain reverts to more primitive patterns and is unable to put emotional experiences into context and produce controlled appropriate responses. The brain’s “plasticity” or ability to adapt to input is affected. You may totally overreact, for example.
The popular saying, “you can sleep when you’re dead,” is not sound advice for a happy, successful life. Most people need at least 8 hours of sleep a night so that we look, feel, and perform at our best.
Call LifeAssist if you are battling to sleep and need some suggestions on how to improve your sleep patterns. We are here to support you.