“As it eats and breathes it also produces waste, so the brain needs to be cleaned and the waste needs to be removed so new fluid full of food and oxygen can come in.
“That happens while we sleep so while you’re sleeping your brain is having a clean which is really good for it.”
Dr Amir added: “As well as that, sleep helps cement memory. So things you’ve learnt that day, while you sleep, they’re cemented in your brain, but also a good night’s sleep helps you to learn new things.
“People who get a good night’s sleep are 40 percent better at learning new things the following day.”