Featured Research

from universities, journals, and other organizations

The Evolution Of Right- And Left-handedness

Date:
March 1, 2006
Source:
University of Chicago Press Journals
Summary:
A study from the April issue of Current Anthropology explores the evolution of handedness, one of few firm behavioral boundaries separating humans from other animals. As researchers find new cultural behaviors among chimpanzees and other primates, language is the only other characteristic accepted to be unique to humans, and both language and handedness appear to relate to the separation of functions between the two halves of the human brain, also known as lateralization.

A study from the April issue of Current Anthropology explores the evolution of handedness, one of few firm behavioral boundaries separating humans from other animals. As researchers find new cultural behaviors among chimpanzees and other primates, language is the only other characteristic accepted to be unique to humans, and both language and handedness appear to relate to the separation of functions between the two halves of the human brain, also known as lateralization.

"The predominant right-handedness of humans has been noted since at least the time of the Greek philosophers Plato and Aristotle," write Amanda Blackburn (University of Manitoba) and Christopher Kn�sel (University of Bradford). "Modern research has shown that hand preference occurs across human cultures and, through observations of ancient art, in ancient peoples."

The researchers compared two test groups � a modern sample of Canadians and a sample of medieval English villagers � to determine the effect repeated movement had on human skeletons separated by over a thousand years. They found that the majority of active individuals display a high degree of asymmetry.

"We studied two groups, one a modern group of Canadians, for whom we could document hand preference and physical activity histories, as well as the breadth of the part of the humerus that makes up the elbow joint," explain the authors. "We then applied the same measurement to a group of medieval English villagers known to us only through their skeletons. This allowed us to demonstrate the usefulness of this trait to determine changes in hand preference in populations separated in time by over a thousand years."

###

Sponsored by the Wenner-Gren Foundation for Anthropological Research, Current Anthropology is a highly respected transnational journal devoted to research on humankind, encompassing the full range of anthropological scholarship on human cultures and on the human and other primate species. Communicating across the subfields, the journal features papers in a wide variety of areas, including social, cultural, and physical anthropology as well as ethnology and ethnohistory, archaeology and prehistory, folklore, and linguistics. For more information, please see our Web site: www.journals.uchicago.edu/CA.

Blackburn, Amanda, and Christopher Kn�sel. "Bilateral Asymmetry of the Epicondylar Breadth of the Humerus." Current Anthropology 47:2.


Story Source:

The above story is based on materials provided by University of Chicago Press Journals. Note: Materials may be edited for content and length.


Cite This Page:

University of Chicago Press Journals. "The Evolution Of Right- And Left-handedness." ScienceDaily. ScienceDaily, 1 March 2006. <www.sciencedaily.com/releases/2006/02/060228175622.htm>.
University of Chicago Press Journals. (2006, March 1). The Evolution Of Right- And Left-handedness. ScienceDaily. Retrieved August 28, 2014 from www.sciencedaily.com/releases/2006/02/060228175622.htm
University of Chicago Press Journals. "The Evolution Of Right- And Left-handedness." ScienceDaily. www.sciencedaily.com/releases/2006/02/060228175622.htm (accessed August 28, 2014).

Share This




More Fossils & Ruins News

Thursday, August 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

40,000-Year-Old Mammoth Skeleton Found On Texas Farm

40,000-Year-Old Mammoth Skeleton Found On Texas Farm

Newsy (Aug. 26, 2014) — A mammoth skeleton was discovered in a gravel pit on Wayne McEwen's Texas farm back in May. It's now being donated to a museum. Video provided by Newsy
Powered by NewsLook.com
Pawn Shop Buys Lincoln Signature For $50, Worth $50,000

Pawn Shop Buys Lincoln Signature For $50, Worth $50,000

Newsy (Aug. 25, 2014) — The signature is one of a couple Lincoln autographs that have popped up recently. Video provided by Newsy
Powered by NewsLook.com
Neanderthals Probably Died Out Earlier Than We Thought

Neanderthals Probably Died Out Earlier Than We Thought

Newsy (Aug. 21, 2014) — A new study is packed with interesting Neanderthal-related findings, including a "definitive answer" to when they went extinct. Video provided by Newsy
Powered by NewsLook.com
Disquieting Times for Malaysia's 'fish Listeners'

Disquieting Times for Malaysia's 'fish Listeners'

AFP (Aug. 19, 2014) — Malaysia's last "fish listeners" -- practitioners of a dying local art of listening underwater to locate their quarry -- try to keep the ancient technique alive in the face of industrial trawling and the depletion of stocks. Duration: 02:29 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins