This week, Julia chats with George Mashour, the Robert B. Sweet Professor and Chair of the Department of Anesthesiology at the University of Michigan. Professor Mashour was the founding director of the University of Michigan Center for Consciousness Science and the Michigan Psychedelic Center.  In this episode, Julia and Professor Mashour discuss the reinvigorated study of psychedelics and the light it may shed on different dimensions of consciousness. Professor Mashour weighs in on the ongoing normative debate about how psychedelic drugs should be defined. Should they be defined on a molecular level by their mechanism of action in the brain or based upon the subjective experience they produce in the user?  He relates the results of an exciting recent study that uses psychedelic drugs as a tool to alter normal states of consciousness. This enables him to compare brain network dynamics in these altered states of consciousness with those dynamics in normal states of consciousness and with those in lowered states of consciousness induced by anesthesia. In some ways, this technique allows us to peer into the brain to find out what brain activity is associated with particular experiences. Professor Mashour also offers his perspective on two of the most prominent theories of consciousness and a groundbreaking ongoing adversarial collaboration evaluating them.  JOIN OUR SUBSTACK! Stay up-to-date with the podcast and become part of the ever-growing community 🙂 https://stanfordpsypod.substack.com/  If you found this episode interesting, please consider leaving us a good rating! It just takes a minute but will allow us to reach more listeners and make them excited about psychology. Links: Professor Mashour’s paper Professor Mashour’s website Podcast Twitter @StanfordPsyPod Podcast Substack https://stanfordpsypod.substack.com/  Let us know what you think of this episode or of the podcast by sending us an email at [email protected]