Mind Matters Natural and Artificial Intelligence News and Analysis

CategoryNeuroscience

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The Day Philosophers Started To Take Consciousness Seriously

Of course, once they did, they found themselves deep in huge conundrums

We sometimes forget how far we are from solving the mystery of consciousness. An anecdote from 1994 might help us understand. Picture an utterly boring, pointless conference in Tucson, Arizona, one of whose attendees was an obscure philosopher from Australia, scheduled to give the third talk. And shook everything up: The brain, Chalmers began by pointing out, poses all sorts of problems to keep scientists busy. How do we learn, store memories, or perceive things? How do you know to jerk your hand away from scalding water, or hear your name spoken across the room at a noisy party? But these were all “easy problems”, in the scheme of things: given enough time and money, experts would figure them out. Read More ›

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Adult and child hands holding encephalography brain paper cutout, Epilepsy awareness, seizure disorder, mental health concept

The Reality of the Mind: The Argument From Epilepsy

Why do epileptic seizures evoke many odd behaviors but not abstract thought?

In the recent debate between neurosurgeon Michael Egnor and philosopher David Papineau, “Atheist Philosopher and Christian Neurosurgeon Debate Materialism” at Theology Unleashed, there was sort of digression at 49:30 on the nature of thought. Dr. Egnor talks about what he learned from his experiences with treating epilepsy and Dr. Papineau responds. Note: Dr. Papineau is a “physicalist.” On that view, “the mind is a purely physical construct, and will eventually be explained entirely by physical theory, as it continues to evolve.” (Philosophy basics) He is considered to be one of the best defenders of naturalism (nature is all there is), often called “materialism.” Michael Egnor: There are three metaphysical questions that I think can be answered in an inferential way, Read More ›

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Illustration of synapse and neuron on a blue background.

Will We Soon Be Able to Test Theories of Consciousness?

Proponents of two leading theories of consciousness are trying to develop tests for their models, in a hitherto baffling field

Science journalist and author Anil Ananthaswamy has written a thoughtful piece at New Scientist on the leading models of consciousness and their relationship to quantum mechanics (quantum physics). Are we reaching the point where we can test at least one of them? Ananthaswamy is well qualified to assess the arguments. He is the author of both Through Two Doors at Once (2018) on quantum physics and The Man Who Wasn’t There (2015) on the nature of the self. Models of consciousness that assume that “consciousness isn’t separate from the material reality that physics explains” (materialist or naturalist theories) fall into three general classes, as he explains. Analysts like Tufts philosopher Daniel Dennett and Princeton neuroscientist Michael Graziano argue that consciousness Read More ›

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Psychology concept. Sunrise and woman silhouette.

Egnor vs. Papineau, Round 4: Egnor Defends the Mind vs. the Brain

Philosopher David Papineau does not feel that neurosurgeon Michael Egnor is being “entirely helpful” at this point…

Yesterday, we published the third portion of the debate between materialist philosopher David Papineau and neurosurgeon Michael Egnor, where the key issue was “Could there have been a material cause for the Big Bang that is held to have started our universe?” For Egnor’s opening statement, go here. Here’s Papineau’s reply. Today, we look at the portion which starts roughly at 26:30 where they start to talk about the human mind. Is the mind simply “what the brain does”? Papineau begins: Note: Dr. Papineau is a “physicalist.” On that view, “the mind is a purely physical construct, and will eventually be explained entirely by physical theory, as it continues to evolve.” (Philosophy basics) He is considered to be one of Read More ›

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Microfono tenuto in mano conferenza

Round 2: Philosopher Papineau Replies to Neurosurgeon Egnor

Dr. Papineau is considered to be one of the best defenders of naturalism (nature is all there is), often called “materialism.”

Yesterday, we published a portion of the transcript of the debate between materialist philosopher David Papineau amd neurosurgeon Michael Egnor, in which Egnor explains how, despite early atheism, the practice of medicine led him to believe that there is a God and that the mind is not simply what the brain does. He offered three reasons. Today, here’s a transcript of David Papineau’s reply. Starts, roughly, at 9:00 min: Note: Dr. Papineau is a “physicalist,” a form of materialism according to which “the mind is a purely physical construct, and will eventually be explained entirely by physical theory, as it continues to evolve.” (Philosophy basics) He is considered to be one of the best defenders of naturalism (nature is all Read More ›

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Mind Atoms

Neurosurgeon Egnor Takes on Philosopher Papineau Round 1

In the debate, Egnor begins by offering three fundamental reasons why the mind is not the brain

Recently, neurosurgeon Michael Egnor debated philosopher David Papineau at Theology Unleashed. Papineau is considered “one of the best defenders of naturalism” (actually, as he admits, physicalism). Egnor talks about how science and the practice of medicine persuaded him that there is a God and that the mind is real. The host is Arjuna and the show is billed as “Eastern theology meets Western skepticism.” What follows is a partial transcript of the first portion, with notes: Michael Egnor: Just as a little background about where I’m coming from, I was raised as a functional atheist, and I was educated as a scientific atheist, so I was an atheist for most of my life. I was a biochemistry major in college, Read More ›

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Frightened guilty dog pug looking sad at camera.

Is Fear the Same Thing for a Human Being as for an Animal?

Psychiatrist Joseph Ledoux has thought about that; it’s a complex problem

Recently, we looked at consciousness from the perspective of Joseph LeDoux’s recent book, A Deep History of Ourselves (1919). Psychologist Lisa Feldman Barrett situates his work at Nature, offering an interesting qualification: LeDoux, an academic at New York University in New York City, is best known for his research on fear, and for carefully mapping the brain circuit centred on the amygdala — a knot of neurons in the medial temporal lobe. The amygdala, he showed, has a crucial role in non-conscious, defensive behaviour responses such as freezing or fleeing. His conclusion, based on the assumption that all mammalian amygdala circuits are structurally similar, was that all mammals (including humans) share these responses. He described this work in The Emotional Read More ›

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The universe inside us, the profile of a young woman and space, the effect of double exposure. scientific concept. The brain and creativity. Elements of this image furnished by NASA

Do Larger Brains Make Us Human? Is That All?

Brain organoid studies suggest a “key genetic switch” that makes human brains grow larger than ape brains

In a study of “mini-brains” (brain organoids), the size of a pea, grown in a dish and incapable of further development, researchers have discovered a “key genetic switch” that makes human brains grow three times larger than primate brains: This new research, published in the journal Cell, used brain organoids to show that this transition occurs more slowly in humans compared to gorillas and chimpanzees – over seven days, compared to five. The progenitor cells in human brain organoids not only retained their cylindrical shape for longer, but also split more frequently so more cells were produced. This was linked to a gene called ZEB2, which switches on sooner in gorilla brain organoids than in human. By delaying the effects Read More ›

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Human brain with an implanted chip.

Can Implanted Computer Chips Cure Depression?

Brain–computer interface (BCI) is promising for paralysis and prosthetics but raises concerns in the treatment of depression

Brain computer interface (BCI) shows promise in treating paralysis or enabling prosthetics to work almost naturally. But BCI for treating depression sounds like hype: Say goodbye to pills, therapy, and all that. With such gloomy prospects, it was only a matter of time scientists realized there must be better ways to treat depression rather than pills. After all, drugs only work because they act on certain brain regions to modulate the concentration of certain neurotransmitters, like serotonin or dopamine. Therefore, in the end, the regulation of mood depends on stimulating brain signals in certain parts of the brain — that is, neurons firing — and this can be done more accurately by just zapping the neurons directly with electricity. Diego Read More ›

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Live lobster in the aquarium. Product in the supermarket. Close up photo of big lobsters in water tank for sale

Can Crabs Think? Can Lobsters Feel? What We Know Now

In Switzerland, it is now illegal to boil a lobster alive. Are the Swiss right? Is it cruel?

Because crustaceans have shells, we may tend to think of them as like machines. Yet crustaceans, along with octopuses, show some surprising abilities and complexities. Take crabs, for example: A new Swansea University study has revealed how common shore crabs can navigate their way around a complex maze and can even remember the route in order to find food … Spatial learning is quite complicated, so figuring out how it works in crustaceans gives us a better understanding of how widespread this ability, and learning in general, is in the animal kingdom.” The researchers tested 12 crabs over four weeks, placing food at the end of the maze each time. The route to the end of the maze required five Read More ›

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Octopus

Octopuses Get Emotional About Pain, Research Suggests

The smartest of invertebrates, the octopus, once again prompts us to rethink what we believe to be the origin of intelligence

The octopus is becoming a popular creature among neuroscientists. It is a very smart invertebrate with an unusually complex nervous system, organized in a fundamentally different way from that of, for example, mammals. Recently, a researcher has found the first strong evidence that octopuses feel pain, as opposed to merely reacting to it. There are two parts to pain: The natural physical reaction, like a sophisticated alarm system, sets off a chain of involuntary responses. But that chain of responses, by itself, doesn’t prove that any “self” is feeling anything. The alarm system would work just the same in an empty building as in a populated one. The second component can be called “emotional.” The life form experiences the pain Read More ›

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Nerve Cell. 3D. Neurons

Researchers Can’t Explain: Memories Drift From Neuron to Neuron

Memories are supposed to stay put in the neurons that lay them down. A recent study, published at Nature, shows that they move a lot…

“Scientists are meant to know what’s going on, but in this particular case, we are deeply confused”, a recent article at The Atlantic begins. It’s about the way nervous system cells don’t simply lay down memories and keep them. The memories drift from neuron to neuron, quite contrary to textbook claims and traditional neuroscience assumptions: The relatively simple explanation found in neuroscience textbooks is that specific groups of neurons reliably fire when their owner smells a rose, sees a sunset, or hears a bell. These representations—these patterns of neural firing—presumably stay the same from one moment to the next. But as Schoonover, Fink, and others have found, they sometimes don’t. They change—and to a confusing and unexpected extent. Schoonover, Fink, Read More ›

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In the Hospital Sick Man Lying on the Bed, His Visiting Wife Hopefully Sits Beside Him and Prays for His Rapid Recovery. Tragic, Somber and Melancholy Scene.

Is It Safe to Revise the Standard for Legally Recognized Brain Death?

People have a right to not have a controversial concept of death imposed upon them

Originally published on MercatorNet on May 28, 2021 by Nancy Valko I have been writing for many years about the implications of brain death, the lesser known “donation after cardiac/circulatory death”, diagnosed brain death cases like the supposedly “impossible” prolonged survival and maturation of Jahi McMath, and unexpected recoveries like Zack Dunlap’s. Some mothers declared “brain dead” were able to gestate their babies for weeks or months to a successful delivery before their ventilators were removed. Last August, I wrote about the World Brain Death Project and the effort to establish a worldwide consensus on brain death criteria and testing to develop the “minimum clinical standards for determination of brain death” (emphasis added). I also wrote about the current effort “to revise the (US) Uniform Determination of Death Act (UDDA) to assure a Read More ›

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creature

We Are Now Informed: Consciousness Does Not Really Exist

Rubbish. Giving up consciousness as an illusion would be like turning off the master switch. What would the ensuing darkness and powerlessness tell us?
What you think is enabling you to listen with any attention to neuroscientists (your dog, coffee cup, and your toothpaste are not listening to neuroscientists) is something — some of them tell us — we should give up as an illusion. Read More ›
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Tree brain with human head cape, idea concept of think  hope freedom and mind , surreal artwork, dream art , fantasy landscape, imagination of nature

New Paper Provides Further Evidence for Free Will

According to the new research, many of the busy brain signals on which the “no free will” position depends on were system noise

We all sense that free will is real. We know that we could have stopped ourselves from making some mistakes. For decades, some neuroscientists have claimed that free will is an illusion, based on some well-publicized experiments. Some recent research challenges that: Experiments spanning the 1960s and 1980s measured brain signals noninvasively and led many neuroscientists to believe that our brains make decisions before we do—that human actions were initiated by electrical waves that did not reflect free, conscious thought. However, a new article in Trends in Cognitive Science argues that recent research undermines this popular case against free will. “This new perspective on the data turns on its head the way well-known findings have been interpreted,” said Adina Roskies, Read More ›

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Cells under a microscope. Cell division. Cellular Therapy. 3d illustration on a dark background

Why Don’t Changes to Our Bodies Create a Different Consciousness?

The sense of consciousness remains single and united despite ceaseless bodily change

In the third podcast of the “Unity of Consciousness” series, Walter Bradley Center director Robert J. Marks interviews Angus Menuge, professor and chair of philosophy at Concordia University, on unique features of human consciousness, including the question of why there really can’t be two of you. But Dr. Marks asks one final question: If consciousness is simply generated by the body, as materialists think, why don’t changes to our bodies create different consciousnesses? https://episodes.castos.com/mindmatters/Angus-Menuge-Episode-3-rev1.mp3 This portion begins at 11:06 min. A partial transcript, Show Notes, and Additional Resources follow. Robert J. Marks: There are cells that change quite a lot. And then there are cells that don’t change a lot, for example, neurons. That is, you keep the same neurons. Read More ›

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There But For Fortune

Life in the Plural: If There Were Two of You, Would “You” Exist?

According to philosopher Angus Menuge, there can’t be two of you, because two things cannot be one thing.

In the third podcast of the series, “Unity of Consciousness,” Walter Bradley Center director Robert J. Marks interviews Angus Menuge, professor and chair of philosophy at Concordia University, on unique features of human consciousness, including the fact that our experiences are a unity, which has prompted some interesting thought experiments, for example those of Richard Swinburne. But here’s another one: What if there really were two of you? https://episodes.castos.com/mindmatters/Angus-Menuge-Episode-3-rev1.mp3 This portion begins at 06:49 min. A partial transcript, Show Notes, and Additional Resources follow. Robert J. Marks: What is the idea of “too many thinkers” in philosophy? Angus Menuge (pictured): The simple view of personal identity is that your soul or your mind is always you. That’s a dualist view. Read More ›

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Double exposure. A curly-haired brunette is standing in the doorway of the theater. Poster events, personality psychology. Cloak and reincarnation. Fasting alcoholic fears. Bifurcation. Made in camera

Why Do We Stay the Same Person Over Time? Why Not Split Up?

It would be a total fluke if all the different clouds of atoms that produce your brain would always produce the same consciousness. But they do

In the third podcast of the series, “Unity of Consciousness,” Walter Bradley Center director Robert J. Marks interviews Angus Menuge, professor and chair of philosophy at Concordia University, on unique features of human consciousness, including the fact that our experiences are a unity, despite being scattered across many brain regions and even if our brains are split in half: But now let’s do some thought experiments, as proposed by Oxford philosopher Richard Swinburne: https://episodes.castos.com/mindmatters/Angus-Menuge-Episode-3-rev1.mp3 This portion begins at 04:55 min. A partial transcript, Show Notes, and Additional Resources follow. Angus Menuge: There’s another problem raised by [philosopher] Richard Swinburne: He imagines that he’s going to have an operation where each of his cerebral hemispheres is placed in another person. So Read More ›

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Human brain model for education in laboratory.

Intelligence: A Thousand Brains — or a Thousand Theories?

What does the iconic mammalian neocortex do that equivalent systems in birds and octopuses can’t do? That’s not clear

Jeff Hawkins, inventor of PalmPilot (a smartphone predecessor) and co-founder of Numenta (2005), does not lack confidence. After an interview with him in connection with his new book, A Thousand Brains: A New Theory of Intelligence (Basic Books 2021), Will Douglas Heaven tells us at MIT Review, “Neuroscientist and tech entrepreneur Jeff Hawkins claims he’s figured out how intelligence works—and he wants every AI lab in the world to know about it”: He’s not the first Silicon Valley entrepreneur to think he has all the answers—and not everyone is likely to agree with his conclusions. But his ideas could shake up AI. Will Douglas Heaven, ““We’ll never have true AI without first understanding the brain”” at MIT Technology Review (March Read More ›

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Various expressions

How Split-Brain Surgery Underlines the Unity of Consciousness

At one time, some thought that if the brain were split, consciousness would be too, but that did not turn out to be true

In the third podcast of a series, “Unity of Consciousness,” Walter Bradley Center director Robert J. Marks interviews Angus Menuge, professor and chair of philosophy at Concordia University, on unique features of human consciousness. They started with the fact that our experiences are a unity despite being scattered across many brain regions. But it’s a remarkable fact that our consciousness remains single even when our brains are split in half: https://episodes.castos.com/mindmatters/Angus-Menuge-Episode-3-rev1.mp3 This portion begins at 03:04 min. A partial transcript, Show Notes, and Additional Resources follow. Robert J. Marks: Let’s talk about the split brain operation where a neurosurgeon goes in and separates the right and left hemispheres. As I understand it, the signal for the epileptic fits starts on Read More ›