What actually happens to your consciousness when you're put under general anesthesia β and how does a drug stop your brain from forming memories while a surgeon cuts into your body?
Professor Bruce MacIver is a Stanford researcher who has spent decades studying how anesthetics work at the cellular level. His lab discovered that anesthetics disrupt learning and memory by enhancing inhibition of specific GABAergic interneurons, and his recent work on microtubules provided key experimental support for the Penrose-Hameroff theory of consciousness. Together with philosopher Tam Hunt, he just published a paper reviving the electromagnetic field theory of consciousness β the idea that your mind is a physical energy field, not just neurons firing.
In this conversation, Paige and Bruce explore:
π©· The terrifying phenomenon of anesthetic awareness β when you're paralyzed and awake during surgery
π©· Why anesthesia doesn't replace natural sleep (and the one drug that actually can)
π©· The full continuum of consciousness β from coma to psychedelic expansion
π©· Whether plants have awareness and what that implies
π©· How theta brain rhythms predict what you're going to do hundreds of milliseconds before you do it
π©· The binding problem: why you feel like one unified self despite billions of neurons
π©· Can you train your brain into deeper states of consciousness through biofeedback?
βοΈ To support conversations like this, shout Paige a coffee:
https://buymeacoffee.com/paigeleacey
TIMESTAMPS:
0:00 β What Happens Under Anesthesia?
0:55 β How Anesthesiologists Define Unconsciousness
3:11 β How Anesthetics Block Memory Formation
5:08 β Acupuncture as an Alternative to Drugs
6:51 β Anesthetic Awareness: Awake But Paralyzed
11:23 β Can You Die From Pain Alone?
13:49 β Sleep vs. Anesthesia: The One Drug That Restores Sleep Naturally
18:13 β The Consciousness Spectrum: Coma to Psychedelic Expansion
20:19 β Do Plants Have Consciousness?
21:32 β Microtubules and the Penrose-Hameroff Theory
24:09 β What Are Microtubules and Why They Matter
29:41 β Is Consciousness Just Neuronal Activity?
30:17 β The Electromagnetic Field Theory of Consciousness
39:00 β The Binding Problem: Why You Feel Like One Self
47:57 β Headphones, EMF Fields, and Your Brain
50:01 β Creating Thought-Like Activity in Disembodied Tissue
54:32 β Biofeedback: Training Your Brain for Deeper Consciousness
57:12 β Closing Thoughts
π Watch more of Bruce's work β search "MacIver Anesthesia and Consciousness" on YouTube
π Connect with Paige:
YouTube: https://www.youtube.com/@PaigeLeacey
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Apple Podcasts: https://podcasts.apple.com/au/podcast/on-the-same-paige-with-paige-leacey/id1573526370
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