Cette étude pense avoir découvert le "E = MC²" du cerveau. SCIENCE - Malgré toutes nos connaissances, nous comprenons encore très mal le fonctionnement du cerveau.
C'est en quelque sorte la machinerie biologique la plus complexe à notre portée. Depuis le début des neurosciences dans les années 60, les chercheurs ont analysé sans relâche cet organe si particulier, composé de quelque 100 milliards de neurones, qui reste bien mystérieux. Pourtant, une équipe de chercheur affirme avoir trouvé le Saint Graal, une équation simple et élégante permettant de comprendre comment le cerveau se structure pour répondre à une stimulation. Et ce modèle serait même généralisable à toutes les espèces. Il pourrait donc, potentiellement, expliquer le fonctionnement de l'intelligence.
Mais ce n'est pas juste une idée en l'air. Codecogs Mais que signifie cette équation? Le "N" correspond aux groupes de neurones impliqués par le cerveau et le "i" au nombre d'informations que nos méninges ont à traiter dans un domaine particulier, que l'on appelle stimuli. Medical Xpress: First evidence for higher state of consciousness found. Scientific evidence of a 'higher' state of consciousness has been found in a study led by the University of Sussex.
Neuroscientists observed a sustained increase in neural signal diversity - a measure of the complexity of brain activity - of people under the influence of psychedelic drugs, compared with when they were in a normal waking state. The diversity of brain signals provides a mathematical index of the level of consciousness. For example, people who are awake have been shown to have more diverse neural activity using this scale than those who are asleep. This, however, is the first study to show brain-signal diversity that is higher than baseline, that is higher than in someone who is simply 'awake and aware'. Previous studies have tended to focus on lowered states of consciousness, such as sleep, anaesthesia, or the so-called 'vegetative' state.
The study is published in Scientific Reports. Research unlocks molecular key to animal evolution and disease. The dawn of the Animal Kingdom began with a collagen scaffold that enabled the organization of cells into tissues.
This key innovation, which made possible the rich diversity of life on earth, is found in the most ancient of currently living animals - the ctenophore, Vanderbilt University Medical Center scientists report today in the online journal eLife. Ctenophores, commonly called comb jellies, are marine invertebrates known for their translucent, globe-like bodies that refract light into dazzling rainbow-like colors.
Physique non linéaire : Fermi voyait juste. Pour mieux comprendre les systèmes non linéaires, qui se manifestent dans de multiples domaines, le physicien Enrico Fermi, aidé par Mary Tsingou, Stanislaw Ulam et John Pasta, avait eu l'idée novatrice d'utiliser un ordinateur pour simuler une situation la plus simple possible.
Intrication quantique : un nouveau record avec 500.000 atomes. Students may forget relevant information in order to protect their own psyches. UCLA-led research has found that students in a college mathematics course experienced a phenomenon similar to repression, the psychological process in which people forget emotional or traumatic events to protect themselves.
In a study published online by the Journal of Educational Psychology, the researchers found that the students who forgot the most content from the class were those who reported a high level of stress during the course. But, paradoxically, the study also found that the strong relationship between stress level and the tendency to forget course material was most prevalent among the students who are most confident in their own mathematical abilities. The phenomenon, which the authors call "motivated forgetting," may occur because students are subconsciously protecting their own self-image as excellent mathematicians, said Gerardo Ramirez, a UCLA assistant professor of psychology and the study's lead author.
The Universe Is as Spooky as Einstein Thought - The Atlantic. There might be no getting around what Albert Einstein called “spooky action at a distance.”
With an experiment described this week in Physical Review Letters—a feat that involved harnessing starlight to control measurements of particles shot between buildings in Vienna—some of the world’s leading cosmologists and quantum physicists are closing the door on an intriguing alternative to “quantum entanglement.” “Technically, this experiment is truly impressive,” said Nicolas Gisin, a quantum physicist at the University of Geneva who has studied this loophole around entanglement.
According to standard quantum theory, particles have no definite states, only relative probabilities of being one thing or another—at least, until they are measured, when they seem to suddenly roll the dice and jump into formation. In 1964, the Northern Irish physicist John Bell found a way to put this paradoxical notion to the test.
The universe might be like a restaurant with 10 menu items, Friedman said. Astronomers Observe Strange Quantum Distortion in Empty Space for the First Time Ever. A Little Less Strange Vacuum birefringence is a weird quantum phenomenon that has only ever been observed on an atomic scale.
Can we see a singularity, the most extreme object in the universe? A team of scientists at the Tata Institute of Fundamental Research (TIFR), Mumbai, India, have found new ways to detect a bare or naked singularity, the most extreme object in the universe.
When the fuel of a very massive star is spent, it collapses due to its own gravitational pull and eventually becomes a very small region of arbitrarily high matter density, that is a 'Singularity', where the usual laws of physics may breakdown. If this singularity is hidden within an event horizon, which is an invisible closed surface from which nothing, not even light, can escape, then we call this object a black hole. In such a case, we cannot see the singularity and we do not need to bother about its effects. But what if the event horizon does not form? Is the multiverse physics, philosophy, or something else entirely?
Testable Theories of the Multiverse But what if the concept of the multiverse were testable?
According to Ranga-Ram Chary, Project Scientist and Project Manager of the U.S. Planck Data Center at Caltech, it just might be. Chary published a study in 2015 in the Astrophysical Journal detailing strange abnormalities in the cosmic microwave background (CMB)—the radiation leftover after the Big Bang. These abnormalities, found when analyzing data from the Planck telescope, could be evidence of “bruising” that occurs when one universe bumps up against another. Physics-Astronomy. Immune cells play surprising role in steady heartbeat. Macrophages squeeze in between heart muscle cells, called cardiomyocytes.
These muscle cells rhythmically contract in response to electrical signals, pumping blood through the heart. By “plugging in” to the cardiomyocytes, macrophages help the heart cells receive the signals and stay on beat. Researchers have known for a couple of years that macrophages live in healthy heart tissue. But their specific functions “were still very much a mystery,” says Edward Thorp, an immunologist at Northwestern University’s Feinberg School of Medicine in Chicago.
He calls the study’s conclusion that macrophages electrically couple with cardiomyocytes “paradigm shifting.” Matthias Nahrendorf, a cell biologist at Harvard Medical School, stumbled onto this electrifying find by accident. Curious about how macrophages impact the heart, he tried to perform a cardiac MRI on a mouse genetically engineered to not have the immune cells.
Brain scans of one-handed people are completely changing our understanding of the brain. Scans taken of people born with only one hand have revealed areas of the brain typically associated with the 'missing hand' are taken over by other parts of the body, radically changing our thinking on how our brain operates. Whether it's an arm or a foot, other limbs seem to fill in for the missing hand. In other words, rather than being responsible for specific parts of the body, as previously thought, different sections of the brain could be responsible for specific functions. The team of researchers say their findings could prompt a fundamental shift in our understanding of the brain and the way it's able to manage certain tasks with different parts of the body. "Scientifically, I think one way to put our results in context is to say, what if the hand area is not the hand area per se, but just the part of the brain in charge of function 'normally' carried by that hand?
" says one of the researchers, Tamar Makin from University College London in the UK. Your true self: How your personality changes throughout life. By Emma Young AS A child, Wendy Johnson was extremely shy. “One of my report cards said: ‘Wendy is so shy, it’s painful to watch!” She’s not like that now. “I am definitely a person who learned to overcome overt shyness,” says Johnson, a psychologist at the University of Edinburgh, UK. An inflamed brain may be a hidden cause of depression. Robert Carter By Dara Mohammadi MIKE had struggled with depression his whole life, but one day in 1995 it all got too much. “I completely fell apart,” he says. Sait-on à quoi ressemble l'ultime instant ? - Science-et-vie.com. There’s still a lot we don’t know about the proton. Nuclear physicist Evangeline Downie hadn’t planned to study one of the thorniest puzzles of the proton. But when opportunity knocked, Downie couldn’t say no. “It’s the proton,” she exclaims.
The mysteries that still swirl around this jewel of the subatomic realm were too tantalizing to resist. The plentiful particles make up much of the visible matter in the universe. Huge New Study Reveals The Impact Of Spanking On Children. The appropriateness of spanking as a parental disciplinary technique arouses passionate debate. But a new meta-analysis of five decades of research suggests that, in addition to the psychological effects on children, there may be a large price to pay for the parents. Measuring the effects of spanking has proven difficult, not only because so many people come to the topic with unmovable opinions, but because spanking is often accompanied by other forms of physical punishment, and many studies do not distinguish these sufficiently for conclusions to be drawn about spanking alone.
In the Journal of Family Psychology, Dr. What are "Neural Correlates" Correlates Of? - Neuroskeptic. In a thought-provoking new paper called What are neural correlates neural correlates of?
, NYU sociologist Gabriel Abend argues that neuroscientists need to pay more attention to philosophy, social science, and the humanities. Abend’s main argument is that if we are to study the neural correlates or neural basis of a certain phenomenon, we must first define that phenomenon and know how to identify instances of it. Sometimes, this identification is straightforward: in a study of brain responses to the taste of sugar, say, there is little room for confusion because we all agree what sugar is. However, if a neuroscientist wants to study the neural correlates of, say, love, they will need to decide what love is, and this is something that philosophers and others have been debating for a long time.
For example, the field of “moral neuroscience” makes heavy use of a family of hypothetical dilemmas called trolley problems. I asked Gabriel Abend what prompted him to write this paper. Fixing broken brains: a new understanding of depression. By Samantha Murphy ONE OF Vanessa Price’s first chronic cases involved a woman we’ll call Paula. Paula came to the London Psychiatry Centre, where Price is a registered nurse, after two years of unrelenting depression. First she stopped seeing her friends. Then she stopped getting out of bed. Finally, she began cutting herself. New Quantum Equation Suggests The Big Bang Never Happened And Our Universe Has No Beginning - Sci-Tech Universe. Creative people physically see and process the world differently. David Crausby/Getty By Alice Klein. Adapting ideas from neuroscience for AI. Science fiction horror wriggles into reality with discovery of giant sulfur-powered shipworm.
Our world seems to grow smaller by the day as biodiversity rapidly dwindles, but Mother Earth still has a surprise or two up her sleeve. Neural networks explained. In the past 10 years, the best-performing artificial-intelligence systems—such as the speech recognizers on smartphones or Google's latest automatic translator—have resulted from a technique called "deep learning.
" Giant atoms could help unveil ‘dark matter’ and other cosmic. The universe is an astonishingly secretive place. Physicists in Australia Just Proved Reality Doesn't Exist - Sci-Tech Universe. Get ready to have your mind blown. According to an experiment led by two physicists in Australia, reality doesn’t exist. Le cerveau actif après la mort ? Pourquoi cette info est fausse. - Science-et-vie.com.
Des physiciens affirment avoir créé un fluide possédant une "masse négative" Elephants' 'body awareness' adds to increasing evidence of their intelligence. Un super pouvoir des tardigrades élucidé. Quantum dots that emit infrared light open new window for biological imaging. New study says we were wrong about sea sponges being the world's first animals. Mutation in clock gene explains why some night owls stay up late. Brain's Navigation Is More Complex Than Previously Thought - Neuroscience News.
Les vols Navette. Your brain does not process information and it is not a computer. Our Brains Instantly Make Two Copies of Each Memory — NOVA Next. Physicists discover an unexpected force acting on nanoparticles in a vacuum. Is consciousness just an illusion? Octopus's Evolution Is Even Stranger Than Thought. VBA Copier uniquement la valeur d'une cellule sans prendre en compte la formule [Résolu] How octopuses, squid, and cuttlefish defy genetics' 'central dogma' Evidence emerges that celiac disease could be triggered by a seemingly harmless virus. Uk.businessinsider. Scientists Have Created an Artificial Synapse That Can Learn Autonomously. The Japanese practice of 'forest bathing' has scientifically proven health benefits — Quartz.
Fixing broken brains: a new understanding of depression. Culture - The obscure religion that shaped the West. This ancient tick is engorged on the oldest mammal blood ever discovered. Is consciousness just an illusion? Pour l'anthropologue Paul Jorion, il ne reste que 2 ou 3 générations avant que l'humanité ne s'éteigne. This unseen form of radioactive decay could help explain where all the antimatter is. Seven ways to skin Schrödinger’s cat. Is dark energy an illusion? Medical Xpress: How the brain reacts to sleep deprivation. Reality check: The hidden connections behind quantum weirdness. Mutations may reveal how Tibetans can live on world’s highest plateau. When giants warped the universe. A new idea connects the synthesis of clays and the origin of metabolism. Medical Xpress: Marmite may be brain food, study says. Apes can tell when we believe something that isn't true, and take pity on us. Les mystérieux signaux radios, captés par les astronomes, viennent bien de l'espace.
AC/DC LYRICS - Nervous Shakedown. PAT BENATAR LYRICS - Anxiety (Get Nervous) This German retiree solved one of world's most complex maths problems - and no one noticed. Scientists have found a way to improve memory with magnetic stimulation. The power of the mind. Six Ancient Legends That Are Based On Real Events. Une explosion cosmique de rayons X déroute les astrophysiciens. Cours de Mécanique industrielle - Mesure de vibrations globales.
Backwards asteroid shares an orbit with Jupiter without crashing. The dark side of the universe – a primer. The Arrow of Time? It's All in Our Heads - The Crux. Les oscillateurs de Georges Lakhovsky (PDF) Scientists 'Reprogram' Mouse Cortical Neurons With Light - D-brief. LES BANA BA ZULU, LES FILS DU CIEL ! - MADININA BUNDU DIA KONGO(ZIKUA DIA MADININA BDK DANS LES AMERIQUES) Alien intelligence: the extraordinary minds of octopuses and other cephalopods. Licorne d'Or. Elishean Portes du Temps. Cymatique : L’harmonie vibratoire de l’univers selon Hans Jenny - Les Atomes Crochus. Manifestations de Kundalini, Rêve Lucide et Expériences hors du corps. ADN électromagnétique et communication entre cellules. TOUT EST VIBRATION - Connaissance Intérieure & Liberté d'Evoluer en Conscience. Géométrie de Lobatchevski-Bolyai.
118, 130201 (2017) - Hamiltonian for the Zeros of the Riemann Zeta Function. Computers learn to cooperate better than humans. Transcending the Brain - Scientific American Blog Network. Your Brain as Laboratory: The Science of Meditation - Scientific American Blog Network. Some fairy tales may be 6000 years old. Icists reveal experimental verification of a key source of fast reconnection of magnetic fields. Giant octopus wears jellyfish cape after it devours its owner. Des minicerveaux fabriqués in vitro. Mobile. Classification des civilisations extraterrestres. Éducation : la France aurait (presque) les élèves les plus indisciplinés.
Do ripples in space-time herald a new theory of gravity? First Drug for Aggressive MS Nets FDA Approval. Scientists predict reading ability from DNA alone. Food for Thought: Do We Owe Our Large Primate Brains to a Passion for Fruit?