text:  It's almost like you have to shut your computer off at the end of the day, but you have to shut your brain off so that your brain can regenerate itself and heal itself. So sleep is at the time, deep sleep, REM sleep, is the moment that you actually repair and rebuild your brain cells. So they're very, very important. The lifestyles that we lead could really alter the aging of the brain, for sure. Are these the short-term or long-term impacts? What do you think?