Eli5: What happens in your body when you fall asleep?

Question

Eli5: What happens in your body when you fall asleep?

In: Biology

Answer 1

Below the ears, not a whole lot changes. Without all the moving we do during the day, we can devote more energy to things like digestion, repair, etc, but the body just keeps on working. As far as what goes on in the brain? We’re not entirely sure. We know we have cycles of different kinds of brain waves, but we’re not really sure what those cycles do