JAN 07, 2018 12:18 PM PST

Understanding Handedness

WRITTEN BY: Carmen Leitch

Researchers have known for a long time that we develop a preference for our dominant hand very early on; it had been thought to be related to genetic differences between brain hemispheres. Last year, scientists found evidence to indicate it was actually related to asymmetrical gene activity in the spinal cord during development in the womb. It would seem that a growing embryo picks a favorite hand before the brain starts to control the body.

Studies have suggested that as much as 92 percent of the global population is right-handed. There have been many theories, both scientific and social, that have attempted to answer the question of why that is, and many researchers have suggested that we evolved to favor our right hands. Studies have also found that people who are left-handed are not psychologically or socially different from right-handers in any way.
About the Author
  • Experienced research scientist and technical expert with authorships on 28 peer-reviewed publications, traveler to over 60 countries, published photographer and internationally-exhibited painter, volunteer trained in disaster-response, CPR and DV counseling.
You May Also Like
NOV 13, 2018
Chemistry & Physics
NOV 13, 2018
Viscoelasticity and Non-Newtonian Fluids
One of these is not like the others: honey, water, ketchup, and blood. The answer? Water, because the other three are all non-Newtonian fluid. When Isaac N...
NOV 18, 2018
Space & Astronomy
NOV 18, 2018
All About NASA's Plan to Drill Deeper Into Mars Than Ever Before
When NASA’s InSight lander arrives at Mars, it will land near the planet’s equator at Elysium Planitia. This location is flat, which is ideal f...
NOV 20, 2018
Videos
NOV 20, 2018
A Major Grant Aims to Improve our Understanding of Age-related Cognitive Decline
The American Heart Association has teamed up with the Allen Initiative in Brain Health and Cognitive Impairment to award the Salk Institute $19.2 million....
NOV 28, 2018
Videos
NOV 28, 2018
Nanorobots That can Move Through the Eye
Researchers want to create tiny drug delivery systems that can move through biological tissue....
DEC 07, 2018
Videos
DEC 07, 2018
The Influence of Genetics on our Future
In recent decades, advances in genetic technologies have changed our world in many different ways....
DEC 09, 2018
Cardiology
DEC 09, 2018
Discharge After Angioplasty Safe, Reduces Cost
Of the 600,000 coronary angioplasties performed in the United States each year, about half of them are elective procedures. A person may opt to undergo the...
Loading Comments...