getSharedSiteSession?rc=1&redirect= Figure 1 Schematic representation of a chick's use of the frontal or lateral field of vision before pecking (α indicates the angle used to peck at the target in this case) Figure 2 Number of pecks directed at a conspecific and at the environment in pairs of companion and stranger chicks. There were more pecks at strangers than at companions in both L- and D-chicks [test condition: F(1, 34) = 16.313, p < 0.001; hatching condition: F(1, 34) = 0.050 (not significant, or “ns”); test × hatching: F(1, 34) = 0.300 (ns)].
Hemispheric Disturbances: On Michael Gazzaniga If our brains act according to the causal laws governing all matter, in what sense can we be said to be free? We live in the age of the fMRI machine, dazzled and bamboozled by pictures of brains “lighting up” in living Technicolor. Before these neuroscientific glory days, the mysteries of the mind had to be approached by rather less alluring methods: postmortem examination of the brains of psychiatric patients, animal experiments of legendary cruelty and intelligence testing after pioneering brain surgeries, to name but a few. Overcoming Information Overload As a writer for the web, I’m well acquainted with information overload. One bit of information leads to five facts, which leads to three articles, which leads to an interesting interview you must listen to right now, which leads to 10 pages in your browser. I’ve always loved the scavenger hunt research requires. Every clue leads to another. Every clue uncovered is a prize in itself: learning something new and interesting and getting one step closer to the carrot (such as the answer to your original question). But there’s always one more thing to look up, learn and digest.
THE BRAIN FROM TOP TO BOTTOM The process of identifying the parts of the brain that are involved in language began in 1861, when Paul Broca, a French neurosurgeon, examined the brain of a recently deceased patient who had had an unusual disorder. Though he had been able to understand spoken language and did not have any motor impairments of the mouth or tongue that might have affected his ability to speak, he could neither speak a complete sentence nor express his thoughts in writing. The only articulate sound he could make was the syllable “tan”, which had come to be used as his name. When Broca autopsied Tan’s brain, he found a sizable lesion in the left inferior frontal cortex. Shots of Awe Subscribe for more Shots of Awe: Ever ponder the miracle of life? Or perhaps wonder about the evolution of intelligence? In Shots of Awe, Jason Silva chases his inspiration addiction as he explores these topics and more. Every week we'll look at the complex systems of society, technology and human existence and discusses the truth and beauty of science in a form of existential jazz. Shots of Awe: where science, philosophy, and inspiration collide.
How birds use their eyes: Opposite left-right specialization for the lateral and frontal visual hemifield in the domestic chick Open Archive Abstract Recent evidence has demonstrated that, in animals with laterally placed eyes, functional cerebral asymmetry is revealed by preferential use of either the left or right eye in a range of behaviors (birds: 1, 2 and 3; fish: 4 and 5; reptiles: 6 and 7). These findings pose a theoretical problem. It seems that there would be disadvantages in having a substantial degree of asymmetry in the use of the two eyes; a deficit on one side would leave the organism vulnerable to attack on that side or unable to exploit resources appearing on one side. Humans Make Language, Language Makes Us Human In this excerpt from his linguistics lecture for the Floating University, Steven Pinker illuminates some of the mysteries surrounding children’s hardwired ability to learn language. What’s the Big Idea? Language is so central to everything we are and do from toddlerhood on that unless you are a) a linguist or b) right now raising a toddler it’s easy to forget just how amazing our capacity to produce and decode speech actually is. For the most part, language just works – by some mysterious process, people all over the world absorb the complex, underlying rules of their native grammars and store a vast lexicon of words and idioms in long-term memory. Effortlessly, we share stories, make demands, manipulate and delight one another with language. Almost never does the conversation come to a screeching halt as someone reels from vertigo over this linguistic highwire act we’re constantly engaged in.
If You Think You're Good At Multitasking, You Probably Aren't : Shots - Health News hide captionTake it easy, fella. iStockphoto.com Take it easy, fella. Structural Asymmetries in the Human Brain: a Voxel-based Statistical Analysis of 142 MRI Scans + Author Affiliations Abstract The use of computational approaches in the analysis of highresolution magnetic resonance images (MRI) of the human brain provides a powerful tool for in vivo studies of brain anatomy. Here, we report results obtained with a voxel-wise statistical analysis of hemispheric asymmetries in regional ‘amounts’ of gray matter, based on MRI scans obtained in 142 healthy young adults. Firstly, the voxel-wise analysis detected the well-known frontal (right > left) and occipital (left > right) petalias. Secondly, our analysis confirmed the presence of left-greater-than-right asymmetries in several posterior language areas, including the planum temporale and the angular gyrus; no significant asymmetry was detected in the anterior language regions.
How journalists use Twitter I've tweeted three times in the last 12 days. Three. Yet I'm on Twitter constantly. I have 15 active columns on TweetDeck.