Showing 86 posts tagged brain
Learning hurts your brain
After publishing an especially challenging quantum mechanics article, it’s not uncommon to hear some of our readers complain that their head hurts. Presumably, they mean that the article gave them a (metaphoric) headache. But it’s actually possible that challenging your brain does a bit of physical damage to the nerve cells of the brain. Researchers are reporting that, following situations where the brain is active, you might find signs of DNA damage within the cells there. The damage is normally restored quickly, but they hypothesize that the inability to repair it quickly enough may underlie some neurological diseases.
» via ars technica
“Googling has, arguably, made Millennials less able than any previous group of twentysomethings to retain information. Recent research suggests that they use Google as a sort of auxiliary memory. In 2011 a team of psychologists led by Betsy Sparrow of Columbia gave 60 undergrads a bunch of trivia (on the order of “an ostrich’s eye is bigger than its brain”) and asked them to type all forty factoids into a computer. Half were told that the file containing these facts would be accessible later; half were told the file would be erased. On a subsequent test of memory, the ones who thought everything would be erased remembered much more. When they believed their document would be saved, Sparrow found, they didn’t bother remembering it; they figured they could always find it (or, as it’s called outside the lab, Google it) when they needed to.”
Hacking the Human Brain: The Next Domain of Warfare
It’s been fashionable in military circles to talk about cyberspace as a “fifth domain” for warfare, along with land, space, air and sea. But there’s a sixth and arguably more important warfighting domain emerging: the human brain.
This new battlespace is not just about influencing hearts and minds with people seeking information. It’s about involuntarily penetrating, shaping, and coercing the mind in the ultimate realization of Clausewitz’s definition of war: compelling an adversary to submit to one’s will. And the most powerful tool in this war is brain-computer interface (BCI) technologies, which connect the human brain to devices.
Current BCI work ranges from researchers compiling and interfacing neural data such as in the Human Conectome Project to work by scientists hardening the human brain against rubber hose cryptanalysis to technologists connecting the brain to robotic systems. While these groups are streamlining the BCI for either security or humanitarian purposes, the reality is that misapplication of such research and technology has significant implications for the future of warfare.
» via Wired
“Both FTC and the Federal Bureau of Investigation have found that older people are easy marks due in part to their tendency to accentuate the positive. According to social neuroscientist Shelley Taylor of the University of California, Los Angeles, research backs up the idea that older people can put a positive spin on things—emotionally charged pictures, for example, and playing virtual games in which they risk the loss of money. “Older people are good at regulating their emotions, seeing things in a positive light, and not overreacting to everyday problems,” she says. But this trait may make them less wary.”
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A man thought to be in a permanent vegetative state for the past 12 years has communicated that he is not in any pain using only his brain, causing his neurologist to say the medical textbooks need to be rewritten. Thirty-nine-year-old Canadian Scott Routley had been completely unresponsive following a car accident and, despite his parents insisting he communicated with them by lifting his thumb or moving his eyes, neurologists said routine physical assessments demonstrated he had a total lack of awareness. However, using a functional magnetic resonance imaging (fMRI) technique developed in 2010 by the University of Cambridge’s Medical Research Council, the Wolfson Brain Imaging Centre at Addenbrooke’s hospital in Cambridge and the University of Liege, a team of neuroscientists was able to ask Routley a series of questions with yes or no answers, and receive reliable and accurate responses.
“Scott has been able to show he has a conscious, thinking mind,” said Adrian Owen, who co-authored the original study and led a team investigating Routley’s case at the Brain and Mind Institute, University of Western Ontario. “We have scanned him several times and his pattern of brain activity shows he is clearly choosing to answer our questions. We believe he knows who and where he is.”
Patients in a vegetative state appear “awake” and exhibit involuntary reflexes such as opening their eyes, but unlike coma patients their non-communicativeness is down to severe brain damage. Owen’s research proves this does not necessarily mean they do not have the ability to understand.
”(via myserendipities)
Why Quick Thinking Leads to Bad Decisions
When people make hasty decisions, they tend to make more mistakes. Now, a new study on monkeys explains why: Brain cells become hypersensitive to new information, even bad information, making us likelier to draw faulty conclusions.
“When we try to do things too quickly, we tend to make more errors and then when we slow down we tend to be more accurate,” said study co-author Richard Heitz, a neuroscientist at Vanderbilt University. “Your brain sees things differently when you’re placed into a situation where you have to make snap decisions.”
» via Yahoo! News
“The most important and paradoxical fact shaping the future of online learning is this: A brain is not a computer. We are not blank hard drives waiting to be filled with data. People learn from people they love and remember the things that arouse emotion. If you think about how learning actually happens, you can discern many different processes. There is absorbing information. There is reflecting upon information as you reread it and think about it. There is scrambling information as you test it in discussion or try to mesh it with contradictory information. Finally there is synthesis, as you try to organize what you have learned into an argument or a paper. Online education mostly helps students with Step 1. As Richard A. DeMillo of Georgia Tech has argued, it turns transmitting knowledge into a commodity that is cheap and globally available. But it also compels colleges to focus on the rest of the learning process, which is where the real value lies”
(via interestingsnippets)
“People who are highly creative often have odd thoughts and behaviors—and vice versa.
Both creativity and eccentricity may be the result of genetic variations that increase cognitive disinhibition—the brain’s failure to filter out extraneous information.
When unfiltered information reaches conscious awareness in the brains of people who are highly intelligent and can process this information without being overwhelmed, it may lead to exceptional insights and sensations.”
(via wildcat2030)
“The analytics systems now being built to extract meaning from once unimaginable amounts of data — sometimes delivering new insights in real time — are moving toward imitating the way the human mind functions. They can sense. They can process multiple inputs simultaneously. They can focus on only the data that’s relevant to a given situation.”
Myth, busted: You only use 10 percent of brain
Good news for all those who ever had a teacher or a parent say “If you would just apply yourself you could learn anything! You’re only using 10 percent of your brain!”
All those people were wrong. If we did use only 10 percent of our brains we’d be close to dead, according to Eric Chudler, director of the Center for Sensorimotor Neural Engineering at the University of Washington, who maintains an entertaining brain science website for kids. “When recordings are made from brain EEGs, or PET scans, or any type of brain scan, there’s no part of the brain just sitting there unused,” he said.
» via MSNBC
