Researchers at Oxford University say that we have nerve cells in the brain that alert us to the fact that its time to sleep. These neurons fire when we’re tired and cool down when we’re rested. So good news for my fellow insomnia sufferers. They say that this info might help them develop new drugs to help target these regions of the brain for a better night’s sleep. The study was carried out on fruit flies but researchers say it could apply to humans. Researchers found that mutant fruit flies with these regions of the brain turned off had trouble sleeping even after being awake all night long. And this lack of sleep affected the flies learning and memory. I know that consequence well! Researchers said these sleep neurons are kind of like a thermostat that determines how long you’ve been awake and then sends out electrical signals to put you to sleep.