Featured Research

from universities, journals, and other organizations

Right or left handling at birth: What impact does it have on development?

Date:
December 13, 2010
Source:
CNRS (Délégation Paris Michel-Ange)
Summary:
Certain events experienced at the moment of birth have consequences on the emotional reactions of animals at an adult age. Researchers have tested the effects of unilateral tactile stimulation on newborn foals. Their results show that animals handled on their right side at birth avoid contact with humans more often than those stimulated on their left side or not at all. This work raises questions on the organization of neonatal care in animals and humans.

An experimenter handling a foal by “rubbing” it vigorously.
Credit: Copyright Séverine Henry

Certain events experienced at the moment of birth have consequences on the emotional reactions of animals at an adult age. Researchers from the Laboratoire d'Ethologie Animale et Humaine (CNRS/Université de Rennes 1) have tested the effects of unilateral tactile stimulation on newborn foals. Their results show that animals handled on their right side at birth avoid contact with humans more often than those stimulated on their left side or not at all. Published in Biology Letters, this work raises questions on the organization of neonatal care in animals and humans.

Events experienced by newborns influence their behavior in the more or less long term. Certain events in early life are crucial for the behavioral and neurological development of animals and can have a considerable impact on the organization and the development of brain asymmetry in particular.

Having observed that handling at birth can have long term effects, a team from the Laboratoire d'Ethologie Animale et Humaine (CNRS / Université de Rennes 1) wondered what impact unilateral stimulation would have on emotional reactions later in life. The ethologists tested the consequences of unilateral tactile stimulations on 28 newborn foals: 10 of them were handled just after birth on their right side (the newborn foals were "rubbed" vigorously for one hour on a single side), 9 others on their left side, while the remaining 9 were not handled at all. The researchers then observed medium-term effects: the reactions of foals to a human approach, when they were 10 days old, differed according to the side stimulated at birth. The right-handled animals fled at the approach of humans more often than the left-handled or unhandled foals.

These results show that tactile stimulation at birth has a medium-term impact, the extent of which depends, among other things, on the side of the stimulation. Consequently, these experiments on foals demonstrate that handling a newborn on the right side or the left side does not have the same consequences. Scientists will henceforth study this unilateral sensitivity in newborn babies in maternity wards, with a view to improving neonatal care in humans and thus the well-being of infants.

Differential outcomes of unilateral interferences at birth. Alice de Boyer des Roches, Virginie Durier, Marie-Annick Richard-Yris, Catherine Blois-Heulin, Mohammed Ezzaouďa, Martine Hausberger and Severine Henry -- Biology letters, 2010 *


Story Source:

The above story is based on materials provided by CNRS (Délégation Paris Michel-Ange). Note: Materials may be edited for content and length.


Journal Reference:

  1. A. d. B. d. Roches, V. Durier, M.-A. Richard-Yris, C. Blois-Heulin, M. Ezzaouia, M. Hausberger, S. Henry. Differential outcomes of unilateral interferences at birth. Biology Letters, 2010; DOI: 10.1098/rsbl.2010.0979

Cite This Page:

CNRS (Délégation Paris Michel-Ange). "Right or left handling at birth: What impact does it have on development?." ScienceDaily. ScienceDaily, 13 December 2010. <www.sciencedaily.com/releases/2010/12/101213122001.htm>.
CNRS (Délégation Paris Michel-Ange). (2010, December 13). Right or left handling at birth: What impact does it have on development?. ScienceDaily. Retrieved August 23, 2014 from www.sciencedaily.com/releases/2010/12/101213122001.htm
CNRS (Délégation Paris Michel-Ange). "Right or left handling at birth: What impact does it have on development?." ScienceDaily. www.sciencedaily.com/releases/2010/12/101213122001.htm (accessed August 23, 2014).

Share This




More Health & Medicine News

Saturday, August 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Drug Used To Treat 'Ebola's Cousin' Shows Promise

Newsy (Aug. 21, 2014) — An experimental drug used to treat Marburg virus in rhesus monkeys could give new insight into a similar treatment for Ebola. Video provided by Newsy
Powered by NewsLook.com
Two US Ebola Patients Leave Hospital Free of the Disease

Two US Ebola Patients Leave Hospital Free of the Disease

AFP (Aug. 21, 2014) — Two American missionaries who were sickened with Ebola while working in Liberia and were treated with an experimental drug are doing better and have left the hospital, doctors say on August 21, 2014. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com
Cadavers, a Teen, and a Medical School Dream

Cadavers, a Teen, and a Medical School Dream

AP (Aug. 21, 2014) — Contains graphic content. He's only 17. But Johntrell Bowles has wanted to be a doctor from a young age, despite the odds against him. He was recently the youngest participant in a cadaver program at the Indiana University NW medical school. (Aug. 21) Video provided by AP
Powered by NewsLook.com
American Ebola Patients Released: What Cured Them?

American Ebola Patients Released: What Cured Them?

Newsy (Aug. 21, 2014) — It's unclear whether the American Ebola patients' recoveries can be attributed to an experimental drug or early detection and good medical care. Video provided by Newsy
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