Description

Source:

Physiology, Sleep Stages

Aakash K. Patel; Vamsi Reddy; John F. Araujo.

https://www.ncbi.nlm.nih.gov/books/NBK526132/#:~:text=Sleep%20occurs%20in%20five%20stages,spent%20in%20the%20N2%20stage.

Used part of the article, no changes made.