Understanding Sleep Stages
Broken sleep refers to frequent awakenings throughout the night, disrupting the natural sleep cycle. REM sleep, characterized by rapid eye movement, plays a crucial role in memory consolidation and mood regulation, while deep sleep is essential but shouldn't dominate the entire night. A healthy sleep pattern involves a balance of various stages, including light, deep, and REM sleep.In this clip
From this podcast

Untangle
A Women's Guide To Getting A Good Night Sleep. With Dr. Shelby Harris.
Related Questions
Is it correct that sleep is divided into two main stages, Non-Rapid Eye Movement (NREM, deep sleep, non-dreaming) and Rapid Eye Movement (REM, dreaming), and that NREM sleep is further divided into alpha, theta, and delta stages, as discussed in the episode Understanding and Using Dreams to Learn and to Forget | Huberman Lab Podcast #5 and the episode Dr. Matthew Walker: The Biology of Sleep & Your Unique Sleep Needs | Huberman Lab Guest Series? Additionally, is it true that the NREM and REM stages alternate within each 90-minute cycle, with more time spent in NREM during the first half of the night and more time in REM during the second half?
Is it correct that sleep is divided into two main stages, Non-Rapid Eye Movement (NREM, deep sleep, non-dreaming) and Rapid Eye Movement (REM, dreaming), and that NREM sleep is further divided into alpha, theta, and delta stages, as discussed in the episode Dr. Matthew Walker: The Biology of Sleep & Your Unique Sleep Needs | Huberman Lab Guest Series? Additionally, is it true that the NREM and REM stages alternate within each 90-minute cycle, with more time spent in NREM during the first half of the night and more time in REM during the second half?
Is it correct that sleep is divided into two main stages, Non-Rapid Eye Movement (NREM, deep sleep, non-dreaming) and Rapid Eye Movement (REM, dreaming), and that NREM sleep is further divided into alpha, theta, and delta stages, as discussed in the episode Understanding and Using Dreams to Learn and to Forget | Huberman Lab Podcast #5 and the episode Dr. Matthew Walker: The Biology of Sleep & Your Unique Sleep Needs | Huberman Lab Guest Series? Additionally, is it true that the NREM and REM stages alternate within each 90-minute cycle, with more time spent in NREM during the first half of the night and more time in REM during the second half, as discussed in the episode Dr. Matthew Walker: The Science & Practice of Perfecting Your Sleep | Huberman Lab Podcast #31 and the clip Sleep Stages Explained?