Mind Matters Natural and Artificial Intelligence News and Analysis

CategoryNeuroscience

boy with iphone
Young man watching a live streaming on his phone

Researchers Find Social Media Affects Amygdala in Kids

Study finds that social media apps heighten sensitivity to peer approval in social settings

A recent study from the University of North Carolina found that social media use affected the brain matter in children, particularly the amygdala, which processes reward and punishment. Per an article from Neoscope, an imprint of Futurism, Researchers from the University of North Carolina have found, in one of the first studies of its kind, that habitually checking social feeds may change the ways early adolescents process social rewards and punishments — changes concrete enough that they can be seen as distinct and divergent neural pathways in brain scans.” Noor Al-Sabai, Scientists Find Something Strange in Brain Scans of Kids Hooked on Social Media (futurism.com) The researchers found that students who checked social media more frequently experienced greater sensitivity to their Read More ›

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tunnel of light

Near-Death Experience Research Is Slowly Filling In the Picture

When an 87-year-old man was having his brain scanned, he died — unexpectedly — of a heart attack. So, in a rare event, the scan recorded his unanticipated final brain activity

In a survey article at Business Insider, Erin Heger points to several studies that shed light on what happens when we die. She starts by referencing Julia A. Nicholson’s recent account of her own NDE when she was eighteen, as a result of a near-fatal car crash: I didn’t feel any pain but I heard voices around me. I could then hear my sister screaming, “She’s dead, my sister is dead.” So I believed that I must have died. I remember my sister, Allan, and John saying, “If you can hear us, move, or touch something,” but I couldn’t move at all. After I started to regain consciousness, I remember seeing the faces of the people that I loved flashing Read More ›

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man in depression

Mental health: Psychotherapy and Drugs Help Different Brain Areas

Camilla Nord reports that psychotherapy changed aspects of the brain’s prefrontal cortex whereas medications affected the amygdala

Whether to treat mental health issues with psychotherapy or drugs has sometimes led to pitting one against the other. For example, as Cambridge neuroscientist Camilla Nord has noted, in a report that no longer seems to be online, the British Psychological Society’s Division of Clinical Psychology stated in 2016 that “There is no firm evidence that mental distress is primarily caused by biochemical imbalances, genes, or something going wrong in the brain …” Rather, the Society cited childhood trauma, abuse, and poverty as causes, to be remedied by political and social change. Other studies (here is a systematic review) found the same thing. Nord responds that mental disorders are brain disorders. However, she does not resort to simplistic claims that Read More ›

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Mousetrap with a piece of cheese on a dark vintage background. The concept -

Finding From Recent Brain Research Supports Free Will

Researchers, altering Libet’s classical experiment, found that human brains show no “readiness potential” when a decision is important

Philosopher Alessandra Buccella and experimental psychologist Tomáš Dominik, both at Chapman University, offer some interesting support for free will. Many commentators interpreted Benjamin Libet’s experiments that showed that the brain’s readiness to make a decision (readiness potential) often preceded the subject’s conscious awareness of the choice that had been made. There! they said, that proves that there is no free will: To many observers, these findings debunked the intuitive concept of free will. After all, if neuroscientists can infer the timing or choice of your movements long before you are consciously aware of your decision, perhaps people are merely puppets, pushed around by neural processes unfolding below the threshold of consciousness. Alessandra Buccella, Tomáš Dominik, “Free Will Is Only an Read More ›

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Tyrannosaurus Rex in the jungle. Generative AI.

Was the Tyrannosaur as Smart as a Monkey? Assessing a New Claim

One researcher argues that, based on bird studies, the huge predators may have had many more brain cells than we have supposed

Vanderbilt University neuroscientist Suzana Herculano-Houzel tells us, in a recent paper, that tyrannosaurs had similar numbers of brain neurons as “primates.” But how would we know? Herculano-Houzel stats with the assumption that dinosaurs are descended from birds and makes a distinction between the theropod dinosaurs like the tyrannosaur and others: From that assumption, Herculano-Houzel realized that theropods in particular had a similar correlation between body mass and brain size to pre-impact birds, or basal birds. From there, she used the neuron count of modern birds like emus and ostritches and applied the same rules of scaling to figure out how many neurons theropods like the T-Rex may have had. Frank Landymore, “In terrifying news, big brained T-rex may have been Read More ›

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Doctor Helps get up . Sick . Elderly Patient.

When It’s Not Clear If a Disorder Is From the Brain or the Mind…

Neurologist Andrew Knox explains to Robert J. Marks that some psychological problems appear as if they were brain problems — yet there’s nothing wrong with the brain

In the podcast released last Thursday, Walter Bradley Center director Robert J. Marks interviewed pediatric neurologist Dr. Andrew Knox from the University of Wisconsin School of Medicine and Public Health on “Ways the brain can break” (#220, January 5, 2023). What follows is Part 4 of the discussion, “When it’s not clear if a disorder is from the brain or the mind…” Here are Part 1: How our brains are — and aren’t — like computers, Part 2: What is happening when children have strokes or dementia signs?, and Part 3: How do strokes, dementia offer insight into how the brain works? https://mindmatters.ai/wp-content/uploads/sites/2/2022/12/Mind-Matters-220-Andrew-Knox-Episode-1.mp3 This portion begins at roughly 25:15 min. A partial transcript and notes, and Additional Resources follow. Epileptic Read More ›

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Sick asian senior woman fainted unconscious at the table, fall face down,elderly female patient stop breathing due to heart failure, cardiac arrest,severe arrhythmia, sudden unexpected death syndrome.

How Do Strokes, Dementia Offer Insight Into How the Brain Works?

Neurologist Andrew Knox thinks the brain may store memories is an associative scheme, where previous memories are used to build up new ones

In the podcast released last Thursday, Walter Bradley Center director Robert J. Marks interviewed pediatric neurologist Dr. Andrew Knox from the University of Wisconsin School of Medicine and Public Health on “Ways the brain can break” (#220, January 5, 2023). What follows is from Part 3 of the discussion. Here’s Part 1: How our brains are — and aren’t — like computers and Part 2: What is happening when children have strokes or dementia signs? https://mindmatters.ai/wp-content/uploads/sites/2/2022/12/Mind-Matters-220-Andrew-Knox-Episode-1.mp3 This portion begins at roughly 18:25 min. A partial transcript and notes, and Additional Resources follow. The discussion began with the question, “How does the brain store memories?” Andrew Knox: There are different schemes for storing memories, but patients with Alzheimer’s seem to have Read More ›

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Human brain neuronal stimulation or activity with the close-up of a neuron cell 3D rendering illustration. Neuroscience, neurology, medicine, science, cognition, intelligence, psychology concepts.

What Is Happening When Children Have Strokes or Dementia Signs?

Many children who would have died 40 years ago can live a relatively full life today but they are at risk of stroke or dementia

In the podcast released yesterday, Walter Bradley Center director Robert J. Marks interviewed pediatric neurologist Dr. Andrew Knox from the University of Wisconsin School of Medicine and Public Health on “Ways the brain can break” (#220, January 5, 2023). What follows reflects Part 2 of the discussion. Here’s Part 1: How our brains are — and aren’t — like computers. https://mindmatters.ai/wp-content/uploads/sites/2/2022/12/Mind-Matters-220-Andrew-Knox-Episode-1.mp3 This portion begins at roughly 10:50 min. A partial transcript and notes, and Additional Resources follow. Andrew Knox: If you had a stroke in what we would call a primary motor area, an area with the connections to motor pathways through the rest of the body — all of those patients might lose the ability to move their arm Read More ›

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Neuron cells sending electrical chemical signals. 3d illustration .

How Our Brains Are — and Aren’t — Like Computers

Pediatric neurologist Andrew Knox looks at the topic with computer engineer Robert J. Marks

In the podcast released today, Walter Bradley Center director Robert J. Marks interviewed pediatric neurologist Dr. Andrew Knox from the University of Wisconsin School of Medicine and Public Health on “Ways the brain can break” (#220, January 5, 2023): The brain is a marvelous organ still not understood. Artificial neural networks are supposed to be a simulation of the human brain. But comparing the brain to an artificial neural network is like comparing the human heart to a pump handle. Dr. Andrew Knox and Dr. Robert J. Marks discuss the brain, aging, and neurology. https://mindmatters.ai/wp-content/uploads/sites/2/2022/12/Mind-Matters-220-Andrew-Knox-Episode-1.mp3 This portion begins at 00:04 min. A partial transcript and Additional Resources follow. Robert J. Marks: I got to ask you kind of a personal Read More ›

transcranial magnetic stimulation
Female doctor does transcranial magnetic stimulation the man with a broken spine. Physiotherapy. Electrotherapeutic treatment of the back.

Recalling the Hype Around Magnets That “End Belief in God”…

The 2015 claim that transcranial magnetic stimulation reduced religious belief in research subjects received wide publicity via a then-active New Atheist movement

Researcher Joel Furches, whose area of specialty is religious deconversion, recalls the 2015 hype around magnets and God: In 2015, religious and atheist forums exploded with news of an experiment performed out at the University of California. Social media feeds were splashed with headlines like “Directing Magnetic Energy Into The Brian Can Reduce Belief In God,” “Scientists reduce belief in God by shutting down the brain’s medial frontal cortex,” and the far more on-the-nose “Scientists Claim Zapping Brains with Magnets Can Treat Belief in God”. Joel Furches, “Magnets, the Human Brain, and God” at Patheos (December 19, 2022) The New Atheist movement was pretty strong at that time (it did not become the godlessness that failed until a few years Read More ›

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Depression and sadness concept artwork

Is Depression an Altered Global State of Consciousness?

Cecily Whiteley and Jonathan Birch from the London School of Economics and Political Science argue that altered consciousness prevents depressed people from just "seeing the bright side"

PhD student Cecily Whiteley and philosophy prof Jonathan Birch, both of the London School of Economics and Political Science, think that depression is often misunderstood. In this 2021 article, noted again at Psyche, they point out that it is not just “feeling low”; it is an altered form of consciousness: The psychologist Andrew Solomon hints at some of these transformations in his memoir The Noonday Demon (2001): “When you are depressed, the past and future are absorbed entirely by the present moment, as in the world of a three-year-old. You cannot remember a time when you felt better, at least not clearly; and you certainly cannot imagine a future time when you will feel better. Being upset, even profoundly upset, Read More ›

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Extreme magnification - Jumping spider portrait, front view

Spiders Are Smart; Be Glad They Are Small

Recent research has shed light on the intriguing strategies that spiders use to deceive other spiders — and prey in general

This story was #7 in 2022 at Mind Matters News in terms of reader numbers. As we approach the New Year, we are rerunning the top ten Mind Matters News stories of 2022, based on reader interest. For those of us who wonder whether invertebrates really think — well, it’s complicated because some do more than we expect but then some don’t. At any rate: “Spiders are smart: Be glad they are small. (March 11, 2022) Spiders, like octopuses, have eight legs. But they share something else as well — like octopuses, once we got around to studying them, they turned out to be much smarter than expected. What makes spiders even more unusual is that they are smart with Read More ›

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White laboratory mouse (Mus musculus ) crawling on a clay pot. Uttarakhand India

Mice Can’t Do Calculus But Their Brains Can

Neuroimaging and mathematics showed that a simple Stop! signal in the brain would not allow a mouse to stop as quickly as it in fact did

Science writer Kevin Hartnett tells us that, based on experiments with mice, the brain sharpens control of precise maneuvers by using comparisons between control signals rather than the signals themselves: [The research] explores a simple question: How does the brain — in mice, humans and other mammals — work quickly enough to stop us on a dime? The new work reveals that the brain is not wired to transmit a sharp “stop” command in the most direct or intuitive way. Instead, it employs a more complicated signaling system based on principles of calculus. This arrangement may sound overly complicated, but it’s a surprisingly clever way to control behaviors that need to be more precise than the commands from the brain Read More ›

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Macro concept of a brain connecting to pure love and intent

Why Many Researchers Now See the Brain as a Quantum System

The hypothesis is that the brain relies on quantum physics, not classical physics, to power thinking processes

Astrophysicist and science writer Elizabeth Fernandez asks us to consider whether quantum processes might help us understand better how the brain works and shed light on consciousness: Some scientists suspect that quantum processes, including entanglement, might help us explain the brain’s enormous power, and its ability to generate consciousness. Recently, scientists at Trinity College Dublin, using a technique to test for quantum gravity, suggested that entanglement may be at work within our brains. If their results are confirmed, they could be a big step toward understanding how our brain, including consciousness, works. Elizabeth Fernandez, “Brain experiment suggests that consciousness relies on quantum entanglement” at Big Think (November 22, 2022) The paper is open access. Her thesis is that the brain Read More ›

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Near death experience ascend up towards the light in the dark tunnel

Study: 1 in 5 Cardiac Patients May Have Near-Death Experience

The researchers found spikes of brain activity, including so-called gamma, delta, theta, alpha, and beta waves up to an hour into CPR

Recent research shows that one in five people who survive cardiopulmonary resuscitation (CPR) after a heart attack ‘may describe lucid experiences of death that occurred while they were seemingly unconscious and on the brink of death”: Led by researchers at NYU Grossman School of Medicine and elsewhere, the study involved 567 men and women whose hearts stopped beating while hospitalized and who received CPR between May 2017 and March 2020 in the United States and United Kingdom. Despite immediate treatment, fewer than 10% recovered sufficiently to be discharged from hospital. Survivors reported having unique lucid experiences, including a perception of separation from the body, observing events without pain or distress, and a meaningful evaluation of life, including of their actions, Read More ›

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Octopus in water

Micro RNAs: A New Clue About Octopus Intelligence?

While octopus brains are very different from vertebrate brains, they share with vertebrates, a huge number of microRNAs

In general, the “intelligent” animals (apes, elephants, crows, whales, dogs, dolphins) are vertebrates, not invertebrates. There is one glaring exception: the cephalopods (octopuses, squid, cuttlefish). They, like vertebrates, developed large, complex brains and unexpectedly sophisticated cognitive abilities. When thinking about the puzzle, we sometimes fall victim to a sort of confusion: We reason that greater intelligence results from the fact that it “helps the octopus survive better.” Perhaps it does. But, while greater intelligence might help many life forms survive better, only a few develop it. In short, we need a “how” explanation here, not a “why” explanation. A recent study from the Max Delbrück Center for Molecular Medicine points to the possible role of microRNAs (miRNAs). MicroRNAs (miRNAs) are Read More ›

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Data center cloud connection network router and switch

Researchers: The Brain’s Claustrum Acts as a Router for Thoughts

Francis Crick thought the claustrum might be the “seat of consciousness,” an inherently materialist concept. The researchers think he was wrong.

Remember Francis Crick (1916–2004) and The Astonishing Hypothesis (1994)?: “You, your joys and sorrows, your memories and ambitions, your sense of personal identity and free will are, in fact, no more than the behaviour of a vast assembly of nerve cells. As Lewis Carroll’s Alice might have phrased it: ‘You’re nothing but a pack of neurons’.” Crick focused on the brain region known as the claustrum as closely tied to consciousness. According to University of Maryland medical researchers, he thought of it as the “seat of consciousness.” Now, the very concept of a “seat of consciousness” assumes that consciousness is a material thing that needs a seat. In other words, consciousness must be found specifically in one place and not Read More ›

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Equestrian sport - dressage

Do Centaurs Really Exist? The Surprising Truth

Well, a half human/half horse cannot literally exist — but the way horses and humans work together has been called a “miracle”

Classical Greek mythology featured the “centaur,” a creature that was half human, half horse. Neuroscientist and horse trainer Janet Jones, author of Horse Brain, Human Brain: The Neuroscience of Horsemanship (Trafalgar Square, 2020), tells us that there is a truth behind the myth (as so often). In what amounts to a “neurobiological miracle,” the horse — a prey animal — and the human — a predator — can learn complete neurological co-operation to perform complex feats that neither can manage alone. How complex are these equestrian feats? Horse-and-human teams perform complex manoeuvres in competitions of all sorts. Together, we can gallop up to obstacles standing 8 feet (2.4 metres) high, leave the ground, and fly blind – neither party able Read More ›

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Opabinia in Cambrian Seas - Three Opabinia regalis animals hunt for prey on a reef of Cambrian Seas in the Paleozoic Era.

Earliest Brain Found — From Over Half a Billion Years Ago

No one was expecting the Cardiodictyon fossil to have a brain

A surprising find for evolutionary neuroscientists is that a tiny life form that lived more than half a billion years ago had a brain. Creatures like Cardiodictyon were not supposed to have had brains: A study published in Science—led by Nicholas Strausfeld, a Regents Professor in the University of Arizona Department of Neuroscience, and Frank Hirth, a reader of evolutionary neuroscience at King’s College London—provides the first detailed description of Cardiodictyon catenulum, a wormlike animal preserved in rocks in China’s southern Yunnan province. Measuring barely half an inch (less than 1.5 centimeters) long and initially discovered in 1984, the fossil had hidden a crucial secret until now: a delicately preserved nervous system, including a brain. University of Arizona, “525-million-year-old fossil Read More ›

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Tree with no leaves shapes like human brain as illustration

Evolution of Human Consciousness SOLVED! — Yet Again, It Seems…

What does the term “evolution” contribute to the discussion of the origin of human consciousness?

At Psychology Today, we read a bold and simple claim about the evolution of consciousness: “A type of information processing called unlimited associative learning (UAL) may be necessary and sufficient for very basic sentience.” The article by University of Toronto psychiatrist Ralph Lewis begins on a very self-assured note: Nothing in biology makes sense except in the light of evolution. The gradualism of evolution has explained and dissolved life’s mysteries—life’s seemingly irreducible complexity and the illusion that living things possess some sort of mysterious vitalizing essence. So, too, evolution is likely to be key to demystifying the seemingly inexplicable, ethereal nature of consciousness. Ralph Lewis, “Learning May Be the Key to the Evolution of Consciousness” at Psychology Today (November 3, Read More ›