the idea that the energy requirements for brain-state transitions are reduced under psychedelics had remained untested, until a recent prodigious study performed by Stephen Parker Singleton and colleagues

 

https://psychedelicreview.com/lsd-and-the-anarchic-brain/

https://en.wikipedia.org/wiki/5-HT2A_receptor

https://www.biorxiv.org/content/10.1101/2021.01.31.429016v1

http://help.brain-map.org/display/humanbrain/Allen+Human+Brain+Atlas