Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Sep 18;6(38):eaba0398. doi: 10.1126/sciadv.aba0398

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

PMC Copyright notice

Fig. 3 — (A) Plot of the logarithm of the ratio of total sleep time to total awake time per day versus the logarithm of brain mass with measured slope of −0.33 before transition and −3.50 after. (B) Plot of the logarithm of the ratio of REM sleep time to total sleep time per day versus the logarithm of brain mass with measured slope of −0.60 before transition and −0.01 after. (C) Plot of the logarithm of the ratio of REM sleep time to total awake time per day versus the logarithm of brain mass with measured slope of −1.00 before transition and −5.10 after. (D) Plot of the logarithm of the ratio of NREM sleep time to total awake time per day versus the logarithm of brain mass with measured slope of 0.09 before transition and −3.16 after. Also, shown on the top horizontal axes is the corresponding age in years.