Artigos em inglês
Determining whether a child is left or right handed can be a challenge. Children will experiment with both sides before they settle on being left, right or mixed dominant. In fact, even though you may see signs of hand dominance in a child at a very young age, most experts suggest laterality is solidified between […]
For a lot of human history, lefties have been seen as a little odd, and unfortunately some have even been treated very badly. For example, the word “sinister” comes from the Latin for “left” or “left hand”. Luckily, some cultures have been more kind. The Inca, an old civilisation from South America, thought left-handed people […]
Discoveries about the world’s 708 million left-handers.While the reasons for left-handedness still largely remain a scientific mystery, neuroscientists work hard to understand this fascinating phenomenon.Here are some recent scientific findings about left-handedness you might not have heard of, yet. 1. There are approximately 708 million left-handers in the world.In a recent statistical integration of 200 […]
Scientists have identified the genes linked to left-handedness By Emily Dixon, CNN (CNN) For the first time, scientists have identified the genetic differences associated with left-handedness, a trait found in 10% of the human population. What’s more, those genetic variants result in differences in brain structure, which might mean that left-handed people have better verbal […]
Angelique Chrisafis, Arts correspondent Guardian Over the centuries they have been beaten on the knuckles, locked up, ridiculed and prevented from reproducing in case they spawned freaks. Now left-handers are facing another affront. A psychology professor told the Guardian Hay festival yesterday that society will never stop being biologically and culturally dominated by right-handers at […]
By Fritz Lenneman Eleven percent of the population is born left-handed, and if they seem different, it’s because they are! Learn six tips for raising a left-handed child. Step 1: Is she a lefty? Congratulate—or blame—yourself. The question of whether left-handedness could be inherited was answered in 2007 when scientist Clyde Francks announced the isolation […]
Scientists have discovered the first gene which appears to increase the odds of being left-handed. The Oxford University-led team believe carrying the gene may also slightly raise the risk of developing psychotic mental illness such as schizophrenia. The gene, LRRTM1, appears to play a key role in controlling which parts of the brain take control […]
What makes a chimpanzee left-handed–nature or environmental influences? Mostly nature, according to a recent study of chimp mothers and infants. That result refutes past animal research, which suggested that behavioral reinforcement and other external factors largely determine animals’ hand–or paw–preferences. In contrast, this study from Emory University’s Yerkes Regional Primate Research Center found that a […]