Today I Found Out

Why Some People are Right Handed And Some Left Handed (2015x183)

Exibido em:: Dez 01, 2015

→Subscribe for new videos every day! https://www.youtube.com/user/TodayIFoundOut?sub_confirmation=1 →How "Dick" came to be short for 'Richard': https://youtu.be/BH1NAwwKtcg?list=PLR0XuDegDqP2Acy6g9Ta7hzC0Rr3RDS6q Never run out of things to say at the water cooler with TodayIFoundOut! Brand new videos 7 days a week! More from TodayIFoundOut Why a Bakers Dozen is 13 Instead of 12 https://youtu.be/UPDV0POS5d0?list=PLR0XuDegDqP3XRa-w_G0dy_aMMXj0Uq-k Why Vampires Can't Exist... and 9 Other Amazing Facts https://youtu.be/cDlat4Pdd4U?list=PLR0XuDegDqP1IHZBUZvKkPwkTr6Gr0OBO In this video: There is no single mechanism that will definitively determine which hand you will prefer. Technology and further studies will continue to help shed light on the subject. What is known is that it essentially comes down to genes and biological asymmetry in the human brain. What tends to be true in so many other aspects of human preference, handedness also seems to be more of a spectrum. You have some people who strongly prefer right or left handedness, and some that can use both with the same level of comfort. Then there are countless people who have different degrees of ability using their non-dominant hand. Want the text version?: http://www.todayifoundout.com/index.php/2012/12/why-some-people-are-right-handed-and-some-left-handed/ Sources: http://www.scientificamerican.com/article.cfm?id=what-causes-some-people-t http://www.nytimes.com/2011/03/08/health/views/08klass.html?_r=0 http://www.sciencedaily.com/releases/2007/08/070805141533.htm http://www.sciencedaily.com/releases/2011/12/111227092931.htm http://facts.randomhistory.com/facts-about-left-handedness.html