Navigation Links
Right-handers, but not left-handers, are biased to select their dominant hand
Date:3/8/2011

Milan, Italy, 8 March 2011 The vast majority of humans over 90% prefer to use their right hand for most skilled tasks. For decades, researchers have been trying to understand why this asymmetry exists. Why, with our two cerebral hemispheres and motor cortices, are we not equally skilled with both hands? A study from the University of Aberdeen in the UK, published in the April 2011 issue of Elsevier's Cortex (http://www.sciencedirect.com/science/journal/00109452), suggests that the explanation may stem from actions that require us to use both hands at the same time, which may bias right-handers toward choosing their right hands.

Gavin Buckingham, now a postdoctoral researcher at the Centre for Brain and Mind at the University of Western Ontario in Canada, and his PhD supervisor Dr. David Carey, asked left- and right-handed participants to reach first toward a pair of targets with both hands at the same time and, immediately afterwards, toward a new single target with only their closest hand. Just before they began the reach, subjects were given a short vibratory pulse on one of their hands, giving them a clue about where the new target would appear, and hence which hand should perform this second portion of the reach. On a small proportion of trials, the pulse was given to the wrong hand, which meant that subjects had to restrain the reach with this incorrectly-cued hand in order to make the reach with the correct hand.

The right-handed subjects had far greater trouble dealing with this incorrect cue when it was given to their right hands, making more mistakes and taking longer to successfully inhibit the reaches, almost as if the right hand was already pre-selected to carry on during the bimanual reach. The left-handed subjects showed no such asymmetries, suggesting that they are less inherently biased to select one hand over the other.

These findings build on a series of studies from the same researchers which have indicated that right-handers have their attention largely directed at their right hands during bimanual tasks. "One explanation for these data is that hand choice is related to hemispheric specialisation for speech and language" says Dr Carey. "Many left-handed people have "right-handed" brains, which weakens the typical bias towards choosing their dominant left hand."


'/>"/>

Contact: Laura Fabri
l.fabri@elsevier.com
39-028-818-4353
Elsevier
Source:Eurekalert

Related medicine news :

1. FDA Warns Cosmetic Doctor about Promoting Anti-Wrinkle Drug before FDA Approval; Unbiased Information on Skin Care a Precious Resource Says SkinTour.com
2. CROI -- Day 3: Selected highlights of NIH-supported research
3. CROI -- Day 2: Selected highlights of NIH-supported research
4. Brigham and Womens Hospital selected to participate in Medicare imaging demonstration project
5. Paper by Rhode Island Hospital physician selected among best of 2010 by JACR
6. Selective strategy recommended for CT scans in emergency departments
7. With proper planning, selective rather than mass vaccination can provide immunity against flu
8. Forces for cancer spread: Genomic instability and evolutionary selection
9. UCLA selected by Homeland Security to help establish guidelines for firefighter health and safety
10. Selective inhibition of BMK1 suppresses tumor growth
11. Selected cells from blood or bone marrow may provide a route to healing blood vessels
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/31/2016)... (PRWEB) , ... May 31, 2016 , ... Splashtop Inc., ... its strategic partnership with e-Jan Networks Co., the leading provider of secure mobile ... customers of e-Jan Networks’s leading CACHATTO remote access solution. Splashtop for ...
(Date:5/31/2016)... ... May 31, 2016 , ... Twenty years ago it was revolutionary: enabling the ... silence the voices they hear. But this approach has proven transformative, both for people ... steadily gained credibility and now is used around the world, but it still lags ...
(Date:5/31/2016)... ... May 31, 2016 , ... ... Corporation, he knew it was something that contractors should have at their disposal ... it gets,” says Butch, CertainTeed’s Director of Contractor Programs. , As a ...
(Date:5/31/2016)... ... May 31, 2016 , ... CallTrackingMetrics's software gives ... monitor the performance of sales and support staff, and to efficiently route calls ... allows customers to record, transcribe, route, document, and report on everything going on ...
(Date:5/31/2016)... Newport Beach, Calif. (PRWEB) , ... May 31, 2016 , ... ... trust among colleagues, clients, and the industry as a whole. On June 2, Northbound ... Coast Symposium on Addictive Disorders (WCSAD) and presenting the opening plenary on “Leadership: The ...
Breaking Medicine News(10 mins):
(Date:5/31/2016)... VALLEY COTTAGE, New York , May 31, 2016 ... traction as an essential ingredient in food, cosmetics and ... 2016 end, representing revenues worth US$ 1.6 Bn. ... vera gels, cosmetics products, juices, and yogurts will continue ... health and wellness trend will also boost positive sentiment ...
(Date:5/31/2016)... May 31, 2016 , Isansys  Lifecare, ... its Patient Status Engine wireless patient monitoring platform, as it ... Germany , Scotland and ... 2 nd generation system, launched earlier this year, is now ... , , This new technology significantly enhances ...
(Date:5/30/2016)... , May 30, 2016 ... report "Healthcare Biometrics Market by Technology (Single-factor ... Multifactor, Multimodal), Application (Workforce Management), End User ... 2021", published by MarketsandMarkets, the market is ... 2021 from USD 1,182.6 Million by 2016, ...
Breaking Medicine Technology: