Take Short Naps for Energy, Long Naps for Restoration
Taking a nap almost always beats a cup of coffee, according to sleep researchers, because a nap restores worn out synapse connections while coffee just pushes them to perform longer.
In memory tests conducted at the University of California, researchers found that naps helped individuals consolidate their thoughts, aiding in the formation of memories. On the other hand, caffeine inhibited memory formation by increasing amounts of the neurotransmitter acetylcholine—a kind of neuro-grime that blocks the smooth flow of certain electrical signals.
But not all naps are equal, say the researchers. Nap duration and the time of day when rest occurs change how shut eye works on the brain. REM sleep, which can help individuals arrive at creative solutions to difficult problems, occurs after about sixty minutes of sleep.
“[I]f you’re looking for a restorative nap, you should sleep later in the day when you have an increased amount of slow wave sleep. And if you’re looking for a nap that might aid your creativity, you should sleep earlier in the day when you experience more REM.”
At Big Think, sleep researcher Shelby Harris explains what happens to the brain during REM sleep:
