Navigation Links
Mysterious 'neural noise' actually primes brain for peak performance

ng.

"We've known for several years that at the behavioral level, we're 'Bayes optimal,' meaning we are excellent at taking various bits of probability information, weighing their relative worth, and coming to a good conclusion quickly," says Pouget. "But we've always been at a loss to explain how our brains are able to conduct such complex Bayesian computations so easily."

Two years ago, while talking with a physics friend, some probabilities in Pouget's own head suddenly resolved.

"One day I had a drink with some machine-learning researchers, and we suddenly said, 'Oh, it's not noise,' because noise implies something's wrong," says Pouget. "We started to realize then that what looked like noise may actually be the brain's way of running at optimal performance."

Bayesian computing can be done most efficiently when data is formatted in what's called "Poisson distribution."

And the neural noise, Pouget noticed, looked suspiciously like this optimal distribution.

This idea set Pouget and his team into investigating whether our neurons' noise really fits this Poisson distribution, and in his current Nature Neuroscience paper he found that it fit extremely well.

"The cortex appears wired at its foundation to run Bayesian computations as efficiently as can be possible," says Pouget. His paper says the uncertainty of the real world is represented by this noise, and the noise itself is in a format that reduces the resources needed to compute it. Anyone familiar with log tables and slide rules knows that while multiplying large numbers is difficult, adding them with log tables is relatively undemanding.

The brain is apparently designed in a similar manner--"coding" the possibilities it encounters into a format that makes it tremendously easier to compute an answer.

Pouget now prefers to call the noise "variability." Our neurons are responding to the light, sounds, and other sensory information
'"/>

Source:University of Rochester


Page: 1 2 3

Related biology news :

1. Defect in gene causes neuralgic amyotrophy
2. New dyslexia theory blames noise
3. Cells use noise to make cell-fate decisions
4. Controversial drug shown to act on brain protein to cut alcohol use
5. Mouse brain cells rapidly recover after Alzheimers plaques are cleared
6. Mouse brain tumors mimic those in human genetic disorder
7. New imaging method gives early indication if brain cancer therapy is effective, U-M study shows
8. First atlas of key brain genes could speed research on cancer, neurological diseases
9. NYU study reveals how brains immune system fights viral encephalitis
10. Stem cells from brain transformed to produce insulin at Stanford
11. Birds brains reveal source of songs
Post Your Comments:
(Date:3/24/2015)... Mar. 24, 2015 Research and Markets ( http://www.researchandmarkets.com/research/kvdtcw/face_and_voice ... Biometrics - Global Strategic Business Report" report to their offering. ... Voice Biometrics in US$ Thousands by the following Segments: Face Biometrics, ... US, Canada , Japan , ... Middle East & Africa , ...
(Date:3/24/2015)... Fla. , March 24, 2015   ... management solutions, today announced that its U.are.U ® ... accessory retailer Goorin Bros . to achieve ... biometrics-based solution secures access to the POS terminal, ... increased risk of data breaches. ...
(Date:3/23/2015)... , March 23, 2015   HOYOS Labs ... management company, today announced that the Company will demonstrate ... both enterprise and consumers at Connect:ID on March 23 ... HOYOS Labs will highlight the IEEE Biometric Open ... ; and enterprise access control system. BOPS was ...
Breaking Biology News(10 mins):Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 2Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 3Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 4Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 5Face and Voice Biometrics - Global Strategic Business Report 2015: Face Recognition Gains Prominence in Immigration Control 6Crossmatch Fingerprint Readers Help Retailer Prevent Data Breaches at Point-of-Sale 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 3
... cell factor overexpressed both in brain tumor cells and ... inducing angiogenesis. The research study, published in the April ... cells and surrounding tissues and may have substantial significance ... the most lethal types of tumor, malignant gliomas. ...
... play an important role in regulating blood flow in ... assumptions underlying today's most sophisticated brain imaging techniques and ... understanding Alzheimer's disease. , In a paper to appear ... available on-line, scientists at the University of Rochester Medical ...
... the Virginia Bioinformatics Institute at Virginia Tech have ... range of microbial genome sequences. , The VBI ... recent article published in Nucleic Acids Research (Vol.34, ... the plant pathogens Phytophthora sojae and Phytophthora ramorum. ...
Cached Biology News:Growth factor-promoting angiogenesis expressed in tumor cells and normal neurons 2Blood flow in brain takes a twist, affecting views of Alzheimer's 2Blood flow in brain takes a twist, affecting views of Alzheimer's 3Virginia Bioinformatics Institutes launches microbial database 2
(Date:3/26/2015)... Louisville, CO (PRWEB) March 26, 2015 ... agency has formed a strategic alliance with Designing Gig ... to their clients. , “Forging this alliance ... company. Now we can extend a comprehensive, end-to-end, ... design, development, strategy, and execution,” said Chuck Miller, president ...
(Date:3/26/2015)... CINCINNATI , March 26, 2015 ... SHPG ) and Cincinnati Children,s Hospital Medical Center ... rare diseases. The goal of the collaboration is to ... diseases with high unmet medical need combining Shire,s ... expertise. As a nationally ranked hospital, Cincinnati Children,s ...
(Date:3/26/2015)... , March 26, 2015 ... a global clinical research organization , ... a definitive agreement to acquire all of ... ("QSI"), a leading provider of specialized pharmacovigilance ... to the collection, detection, assessment, monitoring, and ...
(Date:3/26/2015)... (PRWEB) March 26, 2015 "In America," the ... the United States that is hosted by legendary film actor ... topic of botany in an upcoming segment. , Botany ... in reality it is actually quite a bit more complicated ... of different types of living organisms, from the smallest bacteria ...
Breaking Biology Technology:The Market Element LLC and Designing Gig LLC Form Strategic Alliance 2Shire and Cincinnati Children's Establish Rare Disease Research Collaboration 2Shire and Cincinnati Children's Establish Rare Disease Research Collaboration 3Shire and Cincinnati Children's Establish Rare Disease Research Collaboration 4Shire and Cincinnati Children's Establish Rare Disease Research Collaboration 5PAREXEL Announces Execution of Definitive Agreement to Acquire Quantum Solutions India, Strengthening Leadership In Pharmacovigilance Services 2PAREXEL Announces Execution of Definitive Agreement to Acquire Quantum Solutions India, Strengthening Leadership In Pharmacovigilance Services 3PAREXEL Announces Execution of Definitive Agreement to Acquire Quantum Solutions India, Strengthening Leadership In Pharmacovigilance Services 4
... LLC (the "Purchaser"), a wholly owned subsidiary of Biotechnology Value ... cash tender offer to purchase any and all of the ... ) ("Avigen") that BVF does not own at a price ... offer price represents a 35% premium over Avigen,s closing stock ...
... CEDAR KNOLLS, N.J., Jan. 22 ScienceFirst ... associates have joined the Cedar Knolls office.(Photo: ... http://www.newscom.com/cgi-bin/prnh/20090122/NY61733-b )Valery Sudakin, PhD, has been ... Sudakin was an investigator at GlaxoSmithKline, where ...
... Jan. 22 MichBio, the association for,Michigan,s biosciences ... compiling,the 2009 Michigan Biosciences Directory and Resource Guide, ... biosciences companies and,organizations. The directory will be included ... bi-annual publication spotlighting Michigan,biosciences news and trends. , ...
Cached Biology Technology:BVF Acquisition LLC, a Wholly-Owned Subsidiary of Biotechnology Value Fund, L.P., Commences Tender Offer for Any and All Outstanding Shares of Avigen at $1.00 Per Share 2BVF Acquisition LLC, a Wholly-Owned Subsidiary of Biotechnology Value Fund, L.P., Commences Tender Offer for Any and All Outstanding Shares of Avigen at $1.00 Per Share 3ScienceFirst Staff Expansion 2MichBio Will Publish 2009 Michigan Biosciences Directory and Resource Guide 2
...
Human ABCG2 MAb (Clone 5D3)...
... FP Standardization Kit is used to ... polarization values of fluorescein solutions to ... System. It also allows users to ... their instrument to the expected values ...
...
Biology Products: