Featured Research

from universities, journals, and other organizations

Brain's 'Hearing Center' May Reorganize After Implant Of Cochlear Device

Date:
July 26, 2007
Source:
Society for Neuroscience
Summary:
Cochlear implants -- electronic devices inserted surgically in the ear to allow deaf people to hear -- may restore normal auditory pathways in the brain even after many years of deafness.

Cochlear implants--electronic devices inserted surgically in the ear to allow deaf people to hear--may restore normal auditory pathways in the brain even after many years of deafness.

The results imply that the brain can reorganize sound processing centers or press into service latent ones based on sound stimulation. Jeanne Guiraud, PhD, and colleagues at the University of Lyon, Edouard Herriot University Hospital, and Advanced Bionics, a firm that makes cochlear implants, worked with deaf subjects from 16 to 74 years old and found that younger subjects and those with a shorter history of deafness showed changes that mirrored patterns in people with normal hearing more closely.

"The results imply a restoration to some extent of the normal organization through the use of the cochlear implant," says Manuel Don, PhD, of the House Ear Institute in Los Angeles. "They also claim to find ties between the degree of restored organization and a hearing task. Such ties are of enormous importance in evaluating cochlear implant benefits." Don was not involved in this study.

Guiraud and her team studied 13 profoundly deaf adults who had received cochlear implants, on average, eight months before the study. Electrical stimulation to the ear allowed the team to locate where in the brain's auditory cortex various frequencies were processed and come up with a map for these tones. Their results demonstrated that in people who had cochlear implants for at least three months, normal frequency organization was somewhat restored.

"Our results strongly suggest that the recipient's auditory cortex presents a tonotopic organization that resembles the frequency maps of normal-hearing subjects," says Guiraud.

In the future, the team hopes to determine in detail the ways in which these maps may change as a result of cochlear implants by studying subjects immediately following implant surgery.

The work was a supported by a grant from Advanced Bionics Europe. The results were published in the July 18 Journal of Neuroscience.


Story Source:

The above story is based on materials provided by Society for Neuroscience. Note: Materials may be edited for content and length.


Cite This Page:

Society for Neuroscience. "Brain's 'Hearing Center' May Reorganize After Implant Of Cochlear Device." ScienceDaily. ScienceDaily, 26 July 2007. <www.sciencedaily.com/releases/2007/07/070723170302.htm>.
Society for Neuroscience. (2007, July 26). Brain's 'Hearing Center' May Reorganize After Implant Of Cochlear Device. ScienceDaily. Retrieved April 17, 2014 from www.sciencedaily.com/releases/2007/07/070723170302.htm
Society for Neuroscience. "Brain's 'Hearing Center' May Reorganize After Implant Of Cochlear Device." ScienceDaily. www.sciencedaily.com/releases/2007/07/070723170302.htm (accessed April 17, 2014).

Share This



More Mind & Brain News

Thursday, April 17, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Are School Dress Codes Too Strict?

Are School Dress Codes Too Strict?

AP (Apr. 16, 2014) Pushing the limits on style and self-expression is a rite of passage for teens and even younger kids. How far should schools go with their dress codes? The courts have sided with schools in an era when school safety is paramount. (April 16) Video provided by AP
Powered by NewsLook.com
Could Even Casual Marijuana Use Alter Your Brain?

Could Even Casual Marijuana Use Alter Your Brain?

Newsy (Apr. 16, 2014) A new study conducted by researchers at Northwestern and Harvard suggests even casual marijuana use can alter your brain. Video provided by Newsy
Powered by NewsLook.com
Couples Who Sleep Less Than An Inch Apart Might Be Happiest

Couples Who Sleep Less Than An Inch Apart Might Be Happiest

Newsy (Apr. 16, 2014) A new study by British researchers suggests couples' sleeping positions might reflect their happiness. Video provided by Newsy
Powered by NewsLook.com
Cognitive Function: Is It All Downhill From Age 24?

Cognitive Function: Is It All Downhill From Age 24?

Newsy (Apr. 15, 2014) A new study out of Canada says cognitive motor performance begins deteriorating around age 24. 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