Navigation Links
A good ear: Rats identify specific sounds in noisy environments

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
University of Montreal

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:
Related Image:
A good ear: Rats identify specific sounds in noisy environments
(Date:10/13/2015)... Beach, FL (PRWEB) , ... October 13, 2015 , ... ... Global Laser Vision of San Diego, California. With brands including The LASIK Vision Institute ... successful procedures, making it the nationwide leader in laser vision correction. , Global Laser ...
(Date:10/13/2015)... ... ... Sir Grout of Greater Boston donated an expansive, seven room tile and ... (RMHC®). This donation was made in an effort to give back to the local ... “We believe strongly in the Ronald McDonald House Charities, and they are truly a ...
(Date:10/13/2015)... ... 13, 2015 , ... CURE Media Group, the nation’s leading ... partnership with the International Waldenstrom’s Macroglobulinemia Foundation (IWMF) to expand education ... and physicians. , “Waldenstrom’s Macroglobulinemia is a so-called ‘orphan disease’ that typically ...
(Date:10/13/2015)... ... October 13, 2015 , ... "My friend's son suffers from eczema, and ... cheeks," said an inventor from Platteville, Colo. "I came up with this kit as ... the UNTOUCHABLE to prevent a child from rubbing or scratching his or her face. ...
(Date:10/13/2015)... ... October 13, 2015 , ... Califia Farms , one ... the release of its limited edition holiday seasonal flavors: Almondmilk Holiday Nog, new ... the unique flavor combinations and delicious taste Califia Farms’ beverages are known for, ...
Breaking Medicine News(10 mins):
(Date:10/13/2015)... , Oct. 13, 2015  Synapse Biomedical Inc. ... Post Approval Study (PAS) studying the use of the ... is continuing to enroll patients. the ... to the FDA market-approved criteria. The PAS study group ... August 2014. The study has since expanded the enrollment ...
(Date:10/13/2015)... , Oct. 13, 2015  Nanomedical Diagnostics, ... use in research and diagnostics, announces the completion ... million led by Serra Ventures. ... is providing low-cost, easy-to-use monitoring and diagnostic platforms ... decisions. The funding round will enable the company ...
(Date:10/13/2015)... -- SeraCare Life Sciences, a leading partner to global in ... medicine business unit has launched its second product in ... (NGS)-based tumor profiling assays.  The Seraseq TM Solid ... mutations in key oncogenes and tumor suppressor genes as ... is offered at five additional allele frequencies. ...
Breaking Medicine Technology: