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What exactly is déjà vu? James M.

What exactly is déjà vu?

A brief guide to neuroscience. By Vaughan Bell, The ObserverSunday, April 29, 2012 8:34 EDT It is the boom area in science.

A brief guide to neuroscience

Vaughan Bell explains why. No single ‘God spot’ in human brain. U.

No single ‘God spot’ in human brain

Your IQ Depends on a Single Gene. Some People May Literally Just Be Born Nicer. Our Most Important Memories Live in Just a Few Neurons. There’s math hiding in the music we love. Metaphors actually trigger the sensory parts of our brains. Neuroscience the new face of warfare: experts. How does your brain create short-term memories? If you know you have to remember, say, a phone number for longer than that you will probably be aware of "rehearsing" the number string until you have a chance to write it down.

How does your brain create short-term memories?

Short term memory only lasts for a handful of seconds (a more precise figure would require me looking it up), but this is if you don't rehearse the information. This is measured by showing someone something to remember, and then giving them a distractor task to stop them rehearsing (like counting down from 673 in steps of three). Rehearse it for long enough and it's coded into your long term memory. Like when you're revising for finals. Actually, short term (or working memory) isn't so much defined by time as it is by amount of information. Smells, great and gross, reshape the brain. CALTECH (US) — Based on a new study with locusts, researchers better understand how the brain adapts to remember new and specific smells.

Smells, great and gross, reshape the brain

The California Institute of Technology (Caltech) study focuses on a key feature of human and animal brains—that they are adaptive. They are able to change their structure and function based on input from the environment and on the potential associations, or consequences, of that input. “Although these results were obtained from experiments with insects, the components of the mechanism exist also in vertebrate, including mammalian, brains which means that what we describe may be of wide applicability,” says Stijn Cassenaer, senior research fellow in brain circuitry at Caltech and lead author of a paper—published in the journal Nature —that outlines the findings. The study focused on insects because their nervous systems are smaller, and thus likely to reveal their secrets sooner than those of their vertebrate counterparts.

More news from Caltech: Human Nature and the Neurobiology of Conflict. Each image depicts the arousal response of conservatives (triangle dots) and liberals (square dots) to images that are disgusting or appealing.

Human Nature and the Neurobiology of Conflict

Image: Dodd et al. /Philosophical Transactions of the Royal Society BAreas of inquiry once reserved for historians and social scientists are now studied by neuroscientists, and among the most fascinating is cultural conflict.Science alone won't provide the answers, but it can offer new insights into how social behavior reflects -- and perhaps even shapes -- basic human biology. An upcoming issue of the Philosophical Transactions of the Royal Society B features a collection of new studies on the biology of conflict. On the following pages, Wired looks at the findings.Above:Left versus Right, in the BrainResearch has already shown that, compared to liberals, conservatives display heightened responses to threatening images. This is what your brain on drugs really looks like. This actually raises several questions... 1.

This is what your brain on drugs really looks like

Where did they get the drugs to begin with? And how do you go about getting "permission" from the government (which I assume they had) to conduct these experiments? I can't fathom it's easy to get shrooms in Britain (since Nutt is British and works at a British university, I assume that's where he conducted the experiments). When the brain refuses to take the cash. EMORY (US) — Brain images show personal values that people refuse to disavow—even when offered cash to do so—are processed differently than values that are willingly sold.

When the brain refuses to take the cash

“Our experiment found that the realm of the sacred—whether it’s a strong religious belief, a national identity or a code of ethics—is a distinct cognitive process,” says Gregory Berns, director of the Center for Neuropolicy at Emory University and lead author of the study published in Philosophical Transactions of the Royal Society. Sacred values prompt greater activation of an area of the brain associated with rules-based, right-or-wrong thought processes, the study shows, as opposed to the regions linked to processing of costs-versus-benefits.

When It Comes To Depression, Serotonin Isn't The Whole Story : Shots - Health Blog. Hide captionThe antidepressant Prozac selectively targets the chemical serotonin.

When It Comes To Depression, Serotonin Isn't The Whole Story : Shots - Health Blog

Paul S. Howell/Getty Images When I was 17 years old, I got so depressed that what felt like an enormous black hole appeared in my chest. Everywhere I went, the black hole went, too. So to address the black-hole issue, my parents took me to a psychiatrist at Johns Hopkins Hospital. Neural network gets an idea of number without counting - tech - 20 January 2012. AN ARTIFICIAL brain has taught itself to estimate the number of objects in an image without actually counting them, emulating abilities displayed by some animals including lions and fish, as well as humans.

Neural network gets an idea of number without counting - tech - 20 January 2012

Because the model was not preprogrammed with numerical capabilities, the feat suggests that this skill emerges due to general learning processes rather than number-specific mechanisms. "It answers the question of how numerosity emerges without teaching anything about numbers in the first place," says Marco Zorzi at the University of Padua in Italy, who led the work. The finding may also help us to understand dyscalculia - where people find it nearly impossible to acquire basic number and arithmetic skills - and enhance robotics and computer vision. The skill in question is known as approximate number sense. How exactly do neurons pass signals through your nervous system?