Navigation Links
A good ear: Rats identify specific sounds in noisy environments
Date:11/18/2008

A study conducted on hundreds of rats could help us understand how the brain identifies specific sounds in a noisy environment. The investigation, soon to be published in the journal Brain, was conducted by Alex Martin of the Universit de Montral Department of Psychology.

"Our ears have thousands of ciliated cells with different sensitivities," says Martin. "These cells identify the frequencies that make up a particular sound, but also the spectrum of different frequencies that blend together. That is why we can identify different instruments playing the same note."

For instance, during a concert, when the sound of the crowd mixes with several instruments, our brain can still identify the specific notes played by the trumpet, the violin or any other instrument in the orchestra. Still, Martin was curious to know the impact of background noise on the spatial sensitivity of auditory neurons.

Martin placed rats in a partially echo-free, sound-proof chamber and simultaneously played two types of sounds: Gaussian sound (containing all frequencies) of 25 decibels and a pure sound (made up of one frequency). He found that auditory neurons respond to a pure sound even if there is background noise.

Indeed, 71 percent of neurons don't change their response rate while 16 percent are excited by the sound and demonstrate increased sensitivity. Only 13 percent of neurons decreased their sensitivity in presence of background noise.


'/>"/>

Contact: Sylvain-Jacques Desjardins
sylvain-jacques.desjardins@umontreal.ca
514-343-7593
University of Montreal
Source:Eurekalert  

Page: 1

Related medicine news :

1. UCLA researchers identify markers that may predict diabetes in still-healthy people
2. Emory researchers identify signaling protein for multiple myeloma
3. Dermatologists identify North Texas leishmaniasis outbreak
4. Supplier Assessments to Help Buyers Identify Reliable China Exporters
5. Cancer cells in blood can identify risk of recurrence in breast cancer
6. Radiologists identify early brain marker of Alzheimers disease
7. Running shipwreck simulations backwards helps identify dangerous waves
8. Researchers identify genes that increase rheumatoid arthritis risk
9. Genomic technologies to identify toxic chemicals should be developed
10. Scientists identify brain circuits used in sensation of touch
11. Shopping Sprees Can Cost More Than You Think: How to Identify a Shopping Addiction
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A good ear: Rats identify specific sounds in noisy environments
(Date:10/13/2017)... ... October 13, 2017 , ... Global Healthcare Management’s 4th Annual Kids Fun ... NJ. This free event, sponsored by Global Healthcare Management’s CEO, Jon Letko, is ... is geared towards children of all ages; it is a non-competitive, non-timed event, which ...
(Date:10/13/2017)... ... ... “The Journey: From the Mountains to the Mission Field”: the story of a ... “The Journey: From the Mountains to the Mission Field” is the creation of published ... all ages and currently teaches a class of ladies at her church, which she ...
(Date:10/12/2017)... ... , ... Planet Fitness, one of the largest and fastest growing franchisors and ... flagship location in Covington, LA at 401 N. U.S. Highway 190, in January of ... Depot in the Holiday Square shopping center. Its location allows it to serve both ...
(Date:10/12/2017)... (PRWEB) , ... October 12, 2017 , ... ... AccentCare, a leader in post-acute health care, have expanded their existing home health ... Home Health. , AccentCare has been operating a joint venture home health company ...
(Date:10/12/2017)... ... October 12, 2017 , ... Leading pediatric oncology experts at Children’s National ... 49th Congress of the International Society of Paediatric Oncology (SIOP) Oct. 12-15. ... for Cancer and Blood Disorders at Children’s National, and Stephen P. Hunger, M.D., ...
Breaking Medicine News(10 mins):
(Date:9/28/2017)... Sept. 28, 2017 Hill-Rom Holdings, Inc. (NYSE: ... conference call and webcast on Friday, November 3, 2017, ... and ending at approximately 8:30 a.m. (CDT) / 9:30 ... company,s 2017 financial performance and guidance for 2018, Hill-Rom ... to enhance operational performance, and long-range financial outlook through ...
(Date:9/25/2017)...   Montrium , an industry leader in ... IQPC Trial Master Files & Inspection Readiness Conference ... Clinical Services has selected eTMF Connect ... EastHORN, a leading European contract research organization (CRO), ... to enable greater collaboration with sponsors, improve compliance ...
(Date:9/22/2017)... 2017 AVACEN Medical (AVACEN) announced that its ... helping those with the widespread pain associated with fibromyalgia ... in Essex, England commented, "I ... experiencing no sleep at all, tremendous pain, with every ... recommend [the AVACEN 100] enough, how this has and ...
Breaking Medicine Technology: