Stuart Hameroff

4.4K posts

Stuart Hameroff

Stuart Hameroff

@StuartHameroff

I am a retired Anesthesiologist and Professor, and active consciousness researcher at The University of Arizona.

Tucson, Arizona Katılım Aralık 2010
172 Takip Edilen27.3K Takipçiler
Stuart Hameroff
Stuart Hameroff@StuartHameroff·
Congratulations Daniel and colleagues!
Daniel Lanino@DanielLanino

We've just published a new perspective on the quantum mechanics of the eukaryotic cilium, sharing five independent paths of inquiry into proteins within the sensory membrane and structural core of this organelle — revealing cilia as an ancient quantum sensor at the heart of sensation and cellular information processing. Our manuscript tracks two 21st century scientific revolutions: the recognition of widespread quantum effects in living systems and the reevaluation of non-motile cilia, shifting from putatively vestigial organelles to indispensable players in sensation and development; now, for the first time, we look to unite these forces. We outline common strategies used by biomolecules to sustain and benefit from coherence, entanglement and tunneling within the cell, draw connections to closely related synthetic molecular technology, and introduce the evolution, development and diverse sensory roles of cilia in animals and other eukaryotes. With this work we hope to enable the design of a new generation of bioinspired quantum devices fabricated from naturally abundant molecules and engineered for room temperature activity, and to inspire biologists to test quantum mechanical hypotheses in cilia and beyond. Many thanks to all the authors, the whole of the Weiss group, and the quantum biology community for all the effort that has gone into ideating and drafting this work. Enjoy! Link: onlinelibrary.wiley.com/doi/10.1002/ag…

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
Good description of what Penrose called non-computability, and in complete agreement that it is lacking in AI. AGI is also unlikely because it lacks a motivation for purposeful behavior without conscious feelings. Why would a system do anything purposeful without feelings
Valerio Capraro@ValerioCapraro

Finally, a big name has the courage to tell it: we are nowhere near AGI. Demis Hassabis, CEO of Google DeepMind and Nobel laureate for AlphaFold, put it neat and clear: "Today's systems are nowhere near [AGI]. Doesn't matter how many Erdős problems you solve… I think it's far, far from what a true invention, or someone like Ramanujan, would have been able to do." This is the elephant in the room that many AI enthusiasts prefer not to see, or are actively trying to hide. Erdős problems are well defined, often combinatorial, on finite spaces. They are exactly the kind of problems on which current AI can achieve spectacular performance with a lot of compute and knowledge. A neural network can search a huge graph of possibilities. It can recombine existing knowledge at unprecedented scale. It can discover surprising solutions inside an already defined conceptual space. But true invention is something else. True invention is not only solving a problem. It is inventing new objects, new dimensions, new connections. It is inventing new problems. From resolving to inventing there is a discontinuity that we don't know how to bridge. We are making extraordinary tools. But we are nowhere close to AGI.

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
What exactly is the ‘system’? Health is optimal life but what’s your definition? We say the unitary nature of life depends on quantum coherence, entanglement and Bose Einstein condensation. Those should be optimized for optimal health and graceful aging. And the best place to minimize aging is the cytoskeleton whose microtubules are the cell’s time piece ( time crystal) ingentaconnect.com/content/10.537…
David Sinclair@davidasinclair

Aging is noise in the system and noise can be reduced

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
Thanks. Nice image. It shows the 5 start and 8 start helices winding around the microtubule A lattice in opposite directions. A double helix but unlike DNA they cross repeatedly maybe for quantum error correction, interference or some kind of quantum information processing. Topological qubits. 👍
Matt Gibson@MattGibsonMusic

@StuartHameroff — that Fibonacci A lattice geometry is precisely where a coherence-selection mechanism would show up. The 13-protofilament structure isn't decorative — it's the geometric configuration that satisfies the ordering constraint. The geometry selects the substrate. That's the answer to why microtubules and not everything else. Penrose's intuition about the lattice was pointing at the same thing from the mathematical side. The two frameworks may be converging on the same fixed point from different directions. I'm formalizing this in the monograph. The geometry is checkable.

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
Agreed. It was the Fibonacci geometry of the microtubule A lattice that got the attention of Roger Penrose when I first told him about microtubules.
Matt Gibson@MattGibsonMusic

@StuartHameroff — you've identified the exact gap that needs a mechanism, not just a label. Non-selective binding, selective effect. The question your framework hasn't fully closed: why microtubules specifically? "Highly orchestrated" describes the observation but not the cause. A geometric constraint may be the missing piece. If coherent quantum binding requires a specific angular condition — cos θ = 1/3, a Hausdorff-stable lattice configuration — then microtubules aren't special by assertion. They're special because they're the biological structure that satisfies that condition. Anesthetics don't just randomize quantum states. They perturb the geometric ordering condition itself. Everything already outside that condition is unaffected — not because it's immune, but because it was already incoherent. Consciousness is the one process running on the ordered side of that boundary. That's a falsifiable claim. Either the geometry holds or it doesn't. I've been developing this in a monograph called The Logos Invariant. I'd value your read when it's published. The math is checkable with a calculator. Respectfully, Matt Gibson 🎸🎶

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
Self organized criticality was put forth by Per Bok, originally based on sandpiles. It’s also a possible description of Orch OR with t=h/E the critical point at which consciousness occurs. But about the propofol…. The article claims it acts on inhibitory GABA receptors, which it may, but propofol also binds and acts in tubulin/microtubules. Several recent studies have shown active GABA receptors under propofol anesthesia. The great paper by Bastos, Miller et al on sensory oddballs showed the GABA receptor-mediated oddball signals occurred under propofol without consciousness or memory. Anesthesia must be working in something else e.g.microtubules.
Earl K. Miller@MillerLabMIT

Brains seem to be wired so that signals are “just right”. This paper argues that there is a special “sweet spot” in how the brain is organized that keeps activity balanced. nature.com/articles/s4158… #neuroscience

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Stuart Hameroff retweetledi
pinotsislab
pinotsislab@dimitrispp·
@StuartHameroff Neural activity seems to be coordinated and constrained by the electric field arising from all charged structures in the cytoskeleton, including microtubules , and processes like mechanotransduction, resulting from cytoelectric coupling sciencedirect.com/science/articl…
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Indian Knowledge Systems(IKS) Division, MoE
🌿 3rd International Mind, Brain & Consciousness Conference (MBCC 2026) 📅 3rd–6th June 2026 The IKSMHA Centre, IIT Mandi warmly invites you to MBCC 2026 — a unique confluence of ideas exploring the depths of mind, brain, and consciousness. ✨ Dive into interdisciplinary themes: 🧠 Consciousness Studies & Cognitive Neuroscience 🧘 Yoga & Ayurveda 🎭 Performing Arts 🤖 Artificial Intelligence & IKS-based Technologies 📚 Indian Knowledge Systems & more 🏔️ Experience intellectual exploration and cultural richness set against the serene beauty of the Himalayas. 🔗 Join us for an inspiring journey of knowledge, innovation, and tradition. 🤝 Academic Partners: • @IKS_Media@ResearchBrc #MBCC2026 #Consciousness #IKS #Neuroscience #AI #Yoga #Ayurveda #IITMandi #Conference #Himalayas @rashtrapatibhvn @VPIndia @PMOIndia @narendramodi @EduMinOfIndia @dpradhanbjp @iit__mandi @mygovindia
Indian Knowledge Systems(IKS) Division, MoE tweet media
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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
How does that widespread synchronization occur? What is the origin of EEG? After all these years we have little understanding. pubmed.ncbi.nlm.nih.gov/28314445/ In our 2014 paper pubmed.ncbi.nlm.nih.gov/24070914/ Roger and I proposed EEG derived from beat frequencies if faster microtubule vibrations. Microtubules by themselves oscillate at 39 hertz. pubmed.ncbi.nlm.nih.gov/30093720/
Costa Vakalopoulos@CVakalopoulos

@StuartHameroff That’s not the mechanism of anaesthesia, data shows widespread synchronisation in alpha and delta bands which are due to confluent neuromodulator effects of hyper polarisation and rebound burst activity, largely membrane attributes

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
The electron cloud is a main feature of organic chemistry on which life is based. No electron cloud, no organic chemistry, no life or consciousness. And consciousness is an extremely low energy process, the brain running on 20 Watts.
John Robert Lamarr Greer@Ho66470Hokage

@StuartHameroff Correct in some regards but I reject the "electron cloud" The brain processes information through quantum tunneling. That's why it uses so much energy and requires exquisite thermal regulation.

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
True. The party line is still with membrane proteins but the evidence for that doesn’t exist. It was ruled out in 2008 by the worlds leading anesthesia researchers pubmed.ncbi.nlm.nih.gov/18713892/ Nonetheless the cartoon neuron mentality unfortunately pervading neuroscience and philosophy has persisted, fueled by AI Neurocomputational sentiment. The evidence points to microtubules academic.oup.com/nc/article/202… pubmed.ncbi.nlm.nih.gov/28852014/ Many ‘authorities’ prefer political correctness to scientific evidence.
Carl the Bald@ConscienceCarl

@StuartHameroff claiming it happens exclusively through quantum interactions in microtubules is an active research fringe, not a proven fact. It's a fascinating area bridging anesthesiology, neuroscience, and quantum biology—worth following, but not definitive yet

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
But anesthetic gases do act selectively on consciousness but bind nonspecifically to nonpolar sites all over the brain and body. Those are the facts. It does seem to be a paradox. But here’s the answer. Anesthetic gases bind nonspecifically by quantum van der Waals forces and randomize them without chemical interactions (no charge transfer or coupling. No chemistry,). All the endogenous quantum states not involved in consciousness are already random so Anesthetics have no effect. However microtubule quantum processes are highly orchestrated and coherent like a Bose Einstein condensate and thus susceptible to being randomized. Anesthesia affects only consciousness.
Permamind AI Research@Permamind

@StuartHameroff Non‑selective binding is exactly the problem: if anesthetics interact everywhere, they can’t be a selective consciousness switch. A substrate‑specific quantum mechanism can’t explain a substrate‑independent phenomenon. That’s the contradiction

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
The speed of anesthetic onset and wake-up depend on solubility ‘uptake and distribution’. The anesthetics are binding to anesthetic targets and non-targets all over the body. Highly soluble gases like diethyl ether are very slow and poorly soluble gases like desflurane very fast (counter-intuitive) They both act at the same target, now though to be microtubules, but the fat stores get saturated and store anesthetic. We used ether when I started in anesthesia in the 70s and would visit patients the next day and smell the ether still coming out of them as they remained drowsy.
Jaime@jaimeojedas

Curious question: if microtubule-mediated processes are selectively more vulnerable to anesthetic randomization, would you expect measurable differences in recovery after anesthesia (re-entry timing, reproducibility, coordinated reintegration) relative to a more distributed membrane-threshold model? If comparable anesthetic states produce similar suppression yet differ in how reliably coordinated activity re-emerges, could recovery dynamics help distinguish between these mechanisms?

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
Your arrogant stupidity bothers me. Get your basic facts straight. Anesthetics bind NON-selectively, indiscriminately, promiscuously, to nonpolar regions in proteins, lipids and nucleic acids all over the brain and body in large amounts. And yet they only affect consciousness- selectively. How does ubiquitous nonspecific quantum binding only inhibit consciousness and nothing else? It’s because anesthetic quantum binding randomizes other quantum states with which they bind. This they perturb quantum Bose Einstein condensates in microtubules. mediating consciousness because those quantum processes card highly orchestrated and easily perturbed by randomization. All the other interactions are with quantum processes already randomized and thus unaffected.
Christopher Antoniou@ChristosA89

@StuartHameroff I'm far from a flunk, very rude old man. Why are you bringing up non related aspects of biochemistry 101? The fact anesthetics do bind selectively to proteins in the lipid membrane seems to bother you quite alot?

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
Meyer and Overton showed all anesthetics acted on the same molecular target, assumed to be membrane proteins like GABA receptors. But some anesthetics open the Cl channel, some close it. Others don’t bind at all. Eger et al in 2008 showed that held for all membrane receptors. Recently a study showed continued GABA receptor activity and cognitive processing during propofol anesthesia with no consciousness or memory.
Christopher Antoniou@ChristosA89

@StuartHameroff @StuartHameroff Answer this question: x.com/ChristosA89/st…

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
Anesthetics are insoluble in polar media and dissolve in organic aromatic regions without ions or charges. Oil and water don’t mix. Thats anesthesia kindergarten class. You flunk.
Christopher Antoniou@ChristosA89

@StuartHameroff I absolutely know what I'm talking about. There again with your quantum rubbish. Inert anesthetics don't "avoid ions and charges" and Van der Waals forces are entirely within the realm of classical physics and electromagnetism.

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
You really don’t know what you’re talking about, do you? Inert anesthetics avoid ions and charges and form only quantum van Waals forces which are electron cloud dipole couplings. They only affect collective quantum coherent states by randomizing them, thus affect only microtubule quantum states necessary for consciousness.
Christopher Antoniou@ChristosA89

@eleusinianatlas @StuartHameroff Why? Any inert GA still binds adequately, and fulfil the core mechanisms to catalyse more efflux or influx of relevant cations/anions to disrupt the resting membrane potential, meaning far harder to depolarise (lower rate) and integrate information via synapses and EMF.

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Stuart Hameroff
Stuart Hameroff@StuartHameroff·
Analog/Digital Dendritic waves/axonal spikes Quantum/classical Cognitive Perception/action Intracellular/extracellular Microtubules/neuronal networks Orchestrate/fire Earl is (I mean this as a sincere compliment) ‘The man with two brains’. Consciousness is the transition between the two brains in the Orch OR theory due to OR collapse of the wavefunction. Orch OR is the only theory of consciousness with experimental evidence. academic.oup.com/nc/article/202… I have to say that Earl’s anesthesia colleagues including the celebrated Emory Brown pushing a smorgasbord of membrane protein effects mediating anesthesia without even considering microtubules are completely wrong.
Earl K. Miller@MillerLabMIT

Analog computation in the brain? Yes, says Brass-for-Brains: Analog Computation for Cognition osf.io/preprints/psya… And we agree: Analog Cognition and Consciousness osf.io/preprints/psya… #neuroscience

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