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:2/12/2016)... Boca Raton, FL (PRWEB) , ... February 12, ... ... nation’s largest non-profit organization devoted exclusively to funding innovative lymphoma research and serving ... patient services – hosted over 250 members of South Florida’s philanthropic community at ...
(Date:2/12/2016)... ... February 12, 2016 , ... Coco Libre, the maker of coconut ... Events LA GRAMMY’s Style Lounge Event. Coco Libre will offer musicians and celebrities the ... the big event. The invitation-only gifting suite, held this year at the W Hollywood ...
(Date:2/12/2016)... NV (PRWEB) , ... February 12, 2016 , ... Fisher ... Las Vegas Mayor John J. Lee, Nevada Military Support Alliance president Scott Bensing, and ... House at the VA Southern Nevada Healthcare System. This will be the first ...
(Date:2/12/2016)... ... 12, 2016 , ... Young Asset Protection, a full service ... the latest charity campaign in their community enrichment program. Art Expression utilizes after-school ... cause are currently being accepted at: http://artexpressioninc.org/ . , Art Expression is ...
(Date:2/12/2016)... New York, NY (PRWEB) , ... February 12, ... ... latest edition of “Revolutionizing Cancer Care.” , The print component of ... in Chicago, Dallas, Pittsburgh/Cleveland, New York, Washington DC/Baltimore, and Seattle, with a circulation ...
Breaking Medicine News(10 mins):
(Date:2/12/2016)... 2016 /PRNewswire/ - Demers Ambulances announces its first delivery in the ... Okaloosa County Emergency Medical Services (EMS) consisting of ... LT2 van. Quality Emergency Vehicles in Lecanto, FL ... sale.  This is the latest in Demers, ongoing expansion of ... at Demers. --> Benoit LaFortune , Executive Vice ...
(Date:2/12/2016)...   HeartWare International, Inc . (NASDAQ: HTWR ... discuss its financial results for the three and 12 ... 2016 at 8:00 a.m. ET.  The company plans to ... and webcast.  On the conference call and webcast, management ... fourth quarter and business outlook.   --> ...
(Date:2/12/2016)... Kalifornien, 12. Februar 2016  Sequent Medical, Inc. ... von Patienten für eine Studie zur Sicherheit und ... speziell für die Behandlung von rupturierten intrakraniellen Aneurysmen ... Leiter der Neuroradiologie an der Universitätsklinik Bicètre in ... der CLARYS-Studie hat den ersten Patienten aufgenommen. ...
Breaking Medicine Technology: