Category: Neuroscience | Page 12

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post

News
Date
July 20, 2022

Categorized
Medicine and Health, Neuroscience, Philosophy of Mind

Tagged
Persistent vegetative state (PVS)}

Neuroscientists: We hear when we are asleep — but we don’t listen

_{The new finding may help determine whether an apparently unconscious or demented person can actually understand what is said to him} _{News
July 20, 2022

5

Medicine and Health, Neuroscience, Philosophy of Mind}

Earlier this week, we talked about the fact that the human nose is much more sensitive than we sometimes think. Our sense of smell gets ignored in favor of visual, auditory, or symbolic information — but it’s still there. The same goes with our hearing when we are asleep, researchers say: The researchers were surprised to discover that the brain’s response to sound remains powerful during sleep in all parameters but one: the level of alpha-beta waves associated with attention to the auditory input and related expectations. This means that during sleep, the brain analyzes the auditory input but is unable to focus on the sound or identify it, and therefore no conscious awareness ensues. Tel-Aviv University, “During sleep the Read More ›

Brain stroke concept. Migraine and headache conceptual image, 3D illustration

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post

News
Date
July 20, 2022

Categorized
Medicine and Health, Neuroscience, Philosophy of Mind

Tagged
neuroplasticity}

Thrones Star Can Speak While Lacking “Quite a Bit” of Brain. How?

_{Yes, Emilia Clarke is lucky her aneurysms weren’t worse but, given our brains’ complexity, how do our mental abilities survive?} _{News
July 20, 2022

5

Medicine and Health, Neuroscience, Philosophy of Mind}

Game of Thrones (2011–2019) star Emilia Clarke, who suffered two aneurysms in her twenties, told BBC News that “‘quite a bit’ of her brain no longer functions” after the extensive bleeding and surgeries: “There’s quite a bit missing, which always makes me laugh,” Clarke said, speaking about her brain. “Strokes, basically, as soon as any part of your brain doesn’t get blood for a second, it’s gone. So, the blood finds a different route to get around, but then whatever bit is missing is therefore gone.” … Clarke said at the time that the surgery left her with “a deep paranoia” over whether it would prevent her from continuing a career as an actor. But she went on to star Read More ›

coconut octopus underwater macro portrait on sand

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post

News
Date
July 19, 2022

Categorized
Biology, Natural Intelligence, Neuroscience

Tagged
Octopus intelligence, Octopus intelligence and jumping genes}

Jumping Genes … A New Clue to Octopus Intelligence?

_{Despite being very different, the human brain and the octopus brain share the same sort of jumping genes} _{News
July 19, 2022

4

Biology, Natural Intelligence, Neuroscience}

The fact that octopuses are unusually intelligent (like mammals) — even though they are solitary invertebrates — means that they now receive some protection against cruelty. Protection that no one bothers about for, say, clams and oysters. But the science puzzle remains. How did octopuses and some of their close kin among the cephalopods get so smart? Theories about how mammals and birds got to be smart may not work here. A recent paper adds a little more information to the controversy. Studying the common octopus and the California octopus, researchers found that the same “jumping genes” are active in the octopus brain as in the human one — even though the two types of brain are very different. Jumping Read More ›

Group of cute smart dolphins in the ocean

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post

News
Date
July 14, 2022

Categorized
Biology, Natural Intelligence, Neuroscience

Tagged
Featured, John Timmer, Miracle of Man (book)}

Why Some Life Forms Are Smarter Than Others Is Still a Mystery

_{Brains are not simple so many “just common sense” theories have fallen by the wayside} _{News
July 14, 2022

6

Biology, Natural Intelligence, Neuroscience}

As biologist John Timmer notes at Ars Technica, some life forms appear much more intelligent than others despite having brains of roughly the same size: Animals with very different brains from ours—a species of octopus and various birds—engage with tools, to give just one example. It seems intuitive that a brain needs a certain level of size and sophistication to enable intelligence. But figuring out why some species seem to have intelligence while closely related ones don’t has proven difficult—so difficult that we don’t really understand it. John Timmer, “Brain size vs. body size and the roots of intelligence” at Ars Technica (July 12, 2022) As he points out, some things we might expect to be true — puzzlingly — Read More ›

A classy and gorgeous mestiza woman in a student uniform with bow tie. Serious pensive look in her eyes. Outdoor scene.

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post

News
Date
July 14, 2022

Categorized
Neuroscience

Tagged
Deepfake detection, Deepfakes (detecting deepfakes), Electroencephalography}

Neuroscientists: Our Brains May Detect Deepfakes When Minds Don’t

_{Using electroencephalography, researchers found that brains may be spotting something that minds miss} _{News
July 14, 2022

2

Neuroscience}

In an interesting series of experiments using electroencephalography (EEG), University of Sydney neuroscientists found that our brains are sometimes alerted to computer-generated fakes when our minds really don’t know: When looking at participants’ brain activity, the University of Sydney researchers found deepfakes could be identified 54 percent of the time. However, when participants were asked to verbally identify the deepfakes, they could only do this 37 percent of the time. “Although the brain accuracy rate in this study is low – 54 percent – it is statistically reliable,” said senior researcher Associate Professor Thomas Carlson, from the University of Sydney’s School of Psychology. “That tells us the brain can spot the difference between deepfakes and authentic images.” University of Sydney, Read More ›

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News
Date
July 11, 2022

Categorized
Medicine and Health, Neuroscience, Philosophy of Mind}

Study: Brain Scans Show That Mindfulness Reduces Acute Pain

_{The volunteers who meditated during a controlled pain experiment reported a 32% reduction in severity} _{News
July 11, 2022

5

Medicine and Health, Neuroscience, Philosophy of Mind}

Recently, neuroscientists at the University of California – San Diego studied whether mindfulness meditation can reduce the perception of pain. That, of course, meant actually causing the volunteers to experience pain. What’s at stake is a central claim of mindfulness meditation: “One of the central tenets of mindfulness is the principle that you are not your experiences,” said senior author Fadel Zeidan, PhD, associate professor of anesthesiology at UC San Diego School of Medicine. “You train yourself to experience thoughts and sensations without attaching your ego or sense of self to them, and we’re now finally seeing how this plays out in the brain during the experience of acute pain.” University of California – San Diego, “Mindfulness meditation reduces pain Read More ›

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post

News
Date
July 6, 2022

Categorized
Language, Neuroscience

Tagged
human brain}

Human Brain Has Many More Language Connections Than Chimp Brain

_{That finding isn’t surprising in principle but the researchers pinned down specific areas of greater connectivity} _{News
July 6, 2022

3

Language, Neuroscience}

In a study of brain scans from 50 humans and 29 chimpanzees, researchers discovered an interesting difference: The connections between language areas in the human brain are much larger than previously thought and quite different from those of the chimpanzee brain. That’s, of course, consistent with the relative complexity of human thought and language but the question had not really been examined before with a focus on one specific area. The researchers were interested in a nerve tract that connects the frontal and temporal lobes of the brain, the arcuate fasciculus. Chimpanzee brain connectivity seems to involve mainly the temporal lobe but in humans there is a connection towards the frontal and parietal lobes via the arcuate fasciculus. “Our findings Read More ›

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post

News
Date
June 29, 2022

Categorized
Neuroscience, Philosophy of Mind}

The Human Brain Has Neural Networks Not Found in Lab Mice

_{They are complex special networks whose purpose is silencing other neurons} _{News
June 29, 2022

3

Neuroscience, Philosophy of Mind}

Assuming that human brains and lab mouse brains work roughly the same is fine for many purposes. Even though the human brain has a thousand times more neurons, it must does many of the same basic things for the body as a mouse brain. But studying mouse brains won’t tell us what human brains do besides that. Moritz Helmstaedter of the Max Planck Institute for Brain Research in Frankfurt, asks a telling question: “So, is it primarily the fact that our brains are 1,000-fold larger, house 1000-fold more nerve cells that allows us to play chess and write children’s books, which mice arguably cannot do?” In a just-published study that he led, the researchers examined human tissue removed by neurosurgeons Read More ›

Bipolar disorder mind mental concept. Change of mood. Emotions. Split personality. Dual personality. Head silhouette of man

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post

News
Date
June 26, 2022

Categorized
Information Theory, Neuroscience, Philosophy of Mind

Tagged
Alfred Russel Wallace, Charles Darwin, Donald Hoffman, Francis Crick, Neil Thomas, Panpsychism (vs. materialism)}

The Battle Over the Human Mind Split Two Great Thinkers

_{Charles Darwin opted for a materialist model; his co-theorist Alfred Russel Wallace insisted that the mind was not just the brain} _{News
June 26, 2022

6

Information Theory, Neuroscience, Philosophy of Mind}

Charles Darwin (1809–1882) and Alfred Russel Wallace (1823–2013) share the credit, technically, for the theory of evolution by natural selection but Darwin became the icon. One reason they parted ways was that Wallace did not agree with Darwin that the human mind was simply an organ that evolved naturally, like any other. There had to be something more to it. Philosopher Neil Thomas explains: In his older years Wallace came to reject natural selection as an explanation for the unfurling of all human and even animal life. By then he had transitioned towards the espousal of a form of natural theology; but his initial and gravest misgiving in the 1860s was focused four-square on the mystery of how the human Read More ›

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post

News
Date
June 24, 2022

Categorized
Addiction, Neuroscience, Social Media

Tagged
Christine Rosen, Karl D. Stephan}

Should Kids Under 16 Be Banned From Social Media?

_{An internal study by Instagram found that using the platform made fully one-third of teenage girls feel worse — but they couldn’t stop} _{News
June 24, 2022

7

Addiction, Neuroscience, Social Media}

(This article by Texas State University engineering prof Karl D. Stephan originally appeared at Engineering Ethics Blog (June 20, 2022) under the title “Social Media: For adults only?” and is reprinted with permission.) Writing in National Review, cultural critic Christine Rosen recently proposed a total ban on social media for everyone under the age of 16. One can imagine all sorts of problems with this idea, ranging from enforcement issues to what it would be like living in a country where nearly all the teenagers start screaming at the same time. But let’s step back from the immediate issues and effects, and ask what the ethics of such a ban would be. Rosen cites a number of other things that we don’t let Read More ›

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post

News
Date
June 23, 2022

Categorized
Neuroscience

Tagged
Memory formation}

Ever Wish You Had Total Recall? Ask People Who Do…

_{Recall of every detail of one’s past works out better for some people than for others} _{News
June 23, 2022

8

Neuroscience}

Just why some people can recall almost everything that happened to them is a mystery in neuroscience, in part because they are few in number.

The “My Train Is Moving Too!” Illusion

_{Special neurons help us study the motion of others when we are moving too — but they can sometimes be fooled} _{News
June 22, 2022

3

Neuroscience}

Do you recall that odd feeling when — sitting on a train that you know is standing still — you suddenly feel that it is moving (!)? It happens when you are watching a moving train right beside you and there is no other reference point. There’s a name for that: vection, “the sensation of movement of the body in space produced purely by visual stimulation.” It is a staple, of course, of IMAX films and virtual reality displays. And it’s a fairly easy illusion to produce: It turns out that vection can be induced with any sufficiently decent screen and some scenery. Experimenters can put make people believe they’re spinning in a circle, zipping back and forth, and even Read More ›

Healthy lifestyle choice. Fresh vegetables and fruit shaped as human head

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post

News
Date
June 17, 2022

Categorized
Medicine and Health, Neuroscience

Tagged
Allison Whitten}

Yes, Our Brains — Like Computers — Have a Low-Power Mode

_{Sure they do. It makes a lot of sense to conserve power when food supplies are low} _{News
June 17, 2022

4

Medicine and Health, Neuroscience}

Neuroscientists have often wondered if the high-metabolism human brain had a power conservation mode and a recent open-access paper in Neuron finds that brains use an energy-saving strategy to cope with shortages. Cognitive neuroscientist Allison Whitten explains: Now, in a paper published in Neuron in January, neuroscientists in Nathalie Rochefort’s lab at the University of Edinburgh have revealed an energy-saving strategy in the visual systems of mice. They found that when mice were deprived of sufficient food for weeks at a time — long enough for them to lose 15%-20% of their typical healthy weight — neurons in the visual cortex reduced the amount of ATP used at their synapses by a sizable 29%. But the new mode of processing Read More ›

3D male figure depicting mental health problems

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post

News
Date
June 12, 2022

Categorized
Neuroscience, Philosophy of Mind

Tagged
Bobby Azarian}

Neuroscientist: The Mind Is More Than a Machine — or Is It?

_{Bobby Azarian hopes that self-organization theory can account for consciousness and possibly enable sentient, conscious computers} _{News
June 12, 2022

3

Neuroscience, Philosophy of Mind}

One problem with materialist models of the mind — machine-like or not — is that they don’t account for people who have selves despite serious brain gaps.

Researchers: Our Brains Use Data Compression To Get Things Right

_{A recent experiment with mice showed data compression at work when the mice were making decisions about how to get a reward} _{News
June 8, 2022

5

Artificial Intelligence, Natural Intelligence, Neuroscience}

We are used to thinking of data compression in connection with computers but a recent study with mice shows that brains compress data too. The researchers ask us to imagine a dilemma from anearly video game: If you were a kid in the 80s, or are a fan of retro video games, then you must know Frogger. The game can be quite a challenge. To win, you must first survive a stream of heavy traffic, only to then narrowly escape oblivion by zig-zagging across speeding wooden logs. How does the brain know what to focus on within all this mess? Champalimaud Centre for the Unknown, “The brain applies data compression for decision-making” at Eurekalert (June 6, 2022) Driving in snarled, Read More ›

Group of burning candles against blue background, close up

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post

News
Date
June 5, 2022

Categorized
Neuroscience, Spirituality

Tagged
Andrew Newberg, Michael Egnor, Neurotheology}

Neuroscientist: Spirituality Helps Health Directly and Indirectly

_{Andrew Newberg has spent thirty years studying the effects of spirituality using the techniques of neuroscience} _{News
June 5, 2022

4

Neuroscience, Spirituality}

Neuroscientist Andrew Newberg, co-author with Daniel A. Monti, M.D., of Brain Weaver: Creating the Fabric for a Healthy Mind through Integrative Medicine (Kales Press, 2021), reflected recently on what studies on the mental health benefits of spirituality can teach us. Some of the benefits of spirituality are due to the lifestyle changes it promotes: For example, going to church or other social events that are part of a religious tradition can be beneficial because social support, in and of itself, is beneficial to our mental health. The more people that we have in our social support network, the better we are at coping with various life stressors including problems with jobs, relationships, or health. Most religions also teach people to Read More ›

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post

News
Date
June 3, 2022

Categorized
Neuroscience}

Optical Illusions: What Causes Them? Try Some Out!

_{Illusions can be literal, physiological, or cognitive, depending on which aspect of your brain is the object of a con job on your vision} _{News
June 3, 2022

3

Neuroscience}

Abigail Howell, a biomedical student at ArizonaState University, explains that there are three different types of optical illusion, in which the brain incorrectly interprets what the eyes are seeing: Literal optical illusions are often produced by putting together a collection of multiple images. Each individual image may be easy to see, but the images together may look very different than the originals. This is accomplished through what is known as the “filling-in phenomena.” When the eye sends visual information to the brain, the brain chooses what parts to focus on. Depending on the focus, different layers of the image may be seen. Abigail Howell, “Ask a biologist: What causes optical illusions?” at ArizonaState University She offers as an example of Read More ›

Brain: network of astrocytes (glial cells that support neurons).

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post

News
Date
June 2, 2022

Categorized
Neuroscience

Tagged
Glial cells}

The Zombie Genes That Survive Our Deaths

_{News
June 2, 2022

4

Neuroscience}

Death is an event that is more like a process. Some brain cells even become more active after we die. Neuroscientist Jeffrey A. Loeb explains: “Most studies assume that everything in the brain stops when the heart stops beating, but this is not so,” says the study’s corresponding author Jeffrey Loeb, the John S. Garvin Professor and head of neurology and rehabilitation at the UIC’s College of Medicine. Robby Berman, “‘Zombie’ genes in the brain get to work after you die” at Big Think (March 26, 2021) He and colleagues discovered gene expression in tissue from brain surgery that did not jive with the expressions observed in living humans, whether or not those humans had any neurological disorders. Because he Read More ›

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post

News
Date
June 2, 2022

Categorized
Neuroscience, Philosophy of Mind}

Researchers: Humans Process Information Differently From Monkeys

_{In a paper at Nature Neuroscience, researchers reported on human vs. macaque brains on input/output systems and synergy between regions} _{News
June 2, 2022

6

Neuroscience, Philosophy of Mind}

In the ongoing research puzzle as to exactly why humans are significantly smarter than other animals, researchers writing in Nature Neuroscience have adopted an information theory approach, describing the human brain as a “distributed information-processing system.” They found that we process information differently from other primates. Our brain regions for sensory and motor functions use a simple input/output system with high reliability due to high redundancy (repetition). Our eyes duplicate most of each other’s information but that helps ensure that our view of the scene is correct. However, there is a very different way of processing information — synergistic processing — which integrates signals from across a variety of brain networks. This approach is better adapted, the researchers say, to Read More ›

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post

News
Date
June 1, 2022

Categorized
Neuroscience}

A Little-Known Structure Tells Our Brains What Matters Now

_{Work with monkeys and mice has shed light on the filtering role of a neglected feature of the mammalian brain} _{News
June 1, 2022

4

Neuroscience}

At Scientific American, we learn from a team of neuroscientists, how our brains distinguish important from unimportant sensations. We filter out many more signals than we pay attention to, especially in familiar situations. We notice what has changed — especially if it’s an opportunity or a problem. While the prefrontal cortex is associated with decision-making, it turns out to get some help from a tiny structure in the brain stem, as these researchers discovered: How does the brain accomplish these feats of focus? In recent research at Northwestern University, the University of Chicago and the Salk Institute for Biological Studies in La Jolla, Calif., we have illuminated a new answer to this question. Through several studies, we have discovered that Read More ›