Is It Possible to Measure Electrical Activity in Sleep?

The e gs measures the frequency of electrical oscillations, ranging from low to high. And it also measures power, which is the amount of electrical activity in a particular region of the brain. So if you've seen these grafts of like, electrical brain activity during sleep, what you'll see is that in the periods where you're awake or in r e m sleep, the line grafs produced by the e g have peaks that are very, very close together. They're like higher frequency oscillations compared to what you see in the deepest stages of sleep,. Also called slow wave sleep and characterized by lower frequency electrical activity.