Essentials: Understand and Use Dreams to Learn and Forget

95.479 - 120.072 Andrew Huberman

These 90 minute cycles tend to be comprised more of shallow sleep and slow wave sleep. And we tend to have less so-called REM sleep, R-E-M sleep, which stands for rapid eye movement sleep. For every 90 minute cycle that we have during a night of sleep, we tend to start having more and more REM sleep. So more of that 90 minute cycle is comprised of REM sleep and less of slow wave sleep.