Navigation Links
Brain's timing linked with timescales of the natural visual world
Date:9/5/2007

Researchers have long attempted to unravel the cryptic code used by the neurons of the brain to represent our visual world. By studying the way the brain rapidly and precisely encodes natural visual events that occur on a slower timescale, a team of Harvard bioengineers and brain scientists from the State University of New York have moved one step closer towards solving this riddle. The findings were reported in a September 6th Nature article.

Visual perception is limited by the relatively slow way in which the neurons in our eyes integrate light. This is why, for example, a Hollywood movie consisting of a series of flickering images appears to us as seamless motion, explains Garrett Stanley, Associate Professor of Biomedical Engineering at the Harvard School of Engineering and Applied Sciences. However, when the brain responds to some kind of visual event, such as a ball bouncing, the activity of the neurons responsible for sending information can be precise down to the millisecond, despite the fact that the motion of the ball is much slower.

To determine why the brain might encode visual information with such precision, the researchers relied on data obtained by directly recording neuronal activity in animals while they viewed natural scene movies. Doing so enabled Garrett and his colleagues to pinpoint the pattern of neuronal firings in cells that respond to form and motion.

Their analysis of the data suggests that the brains timescale depends on the nature of the visual stimulus. In other words, the precise timing of the neurons (i.e. their internal clock) changes relative to the timescale of the visual scene. For example, a faster bouncing ball results in more precise brain activity than a slower one. In each case, however, the precision of the neurons activity was several times that of the speed of the bouncing ball.

It turns out that the extreme precision of the brains neural response to visual stimuli is, paradoxicall
'/>"/>

Contact: Michael Patrick Rutter
mrutter@seas.harvard.edu
617-496-3815
Harvard University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Bird Brains Show How Trial and Error May Contribute to Learning
2. Birds brains reveal source of songs
3. Supercomputers to focus brains on AIDS dilemma
4. Mice brains shrink during winter, impairing some learning and memory
5. Bees, Brains and Addiction
6. Divergent life history shapes gene expression in brains of salmon
7. Jumping genes contribute to the uniqueness of individual brains
8. Experts discuss use of human stem cells in ape and monkey brains
9. Brains response to visual stimuli helps us to focus on what we should see, rather than all there is to see
10. Sharp older brains are not the same as younger brains
11. Brainstem blocks pain to protect key behaviors
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/22/2014)... 2011 the Society of Environmental Toxicology and Chemistry (SETAC) ... and prioritize the scientific research needed to understand the ... the environment. The effort was extended, and results ... Society,s international journal, Integrated Environmental Assessment and Management ... a podcast interviewing the lead author of the study, ...
(Date:9/22/2014)... Additive manufacturing (AM), or 3D printing, has rapidly ... metal components strong enough for structural applications. However, ... as well as quality standards to test the ... technology. Engineers at the University of Pittsburgh,s Swanson ... modeling and simulation (M&S) technology and new qualification ...
(Date:9/22/2014)... and larger areas of sea ice melt in the summer ... it is thinner and more reduced. As the Arctic summers ... warming, because reduced sea ice in the Arctic will remove ... our results are representative, then sea ice plays a greater ... in future global CO2 budgets", says Dorte Haubjerg Sgaard, PhD ...
Breaking Biology News(10 mins):Priorities for research on pharmaceutical and personal care products in the environment 2Pitt engineers receive grants to enhance additive manufacturing 2Pitt engineers receive grants to enhance additive manufacturing 3Arctic sea ice helps remove CO2 from the atmosphere 2
... Nov. 21, 2011 Already partnering with 43 of ... Top 100 Innovators, NineSigma today announced a record year ... is critical to their long-term growth. "The ... never hesitate in their quest to innovate," said Andy ...
... data from electronic tags, ear bone microchemistry and fisheries catch ... of the Atlantic influences the other side. Bluefin populations ... since 1950, according to the study published today in the ... estimates the number of Atlantic bluefin tuna remaining in the ...
... FLAGSTAFF, Ariz. More peer-reviewed scientific studies ... developments and operations are needed to adequately assess their ... scientific literature review conducted by the U.S. Geological Survey ... In their literature review, the authors of the paper, ...
Cached Biology News:Surging Demand for Innovation Services Leads to Record Expansion for NineSigma 2Surging Demand for Innovation Services Leads to Record Expansion for NineSigma 3New study provides comprehensive view of the status of Atlantic bluefin tuna 2New study provides comprehensive view of the status of Atlantic bluefin tuna 3Literature review on solar energy and wildlife impacts research 2
(Date:9/22/2014)... TORONTO , Sept. 22, 2014 ... announced that it has entered into a collaboration ... UHN,s Centre for Molecular Design and Preformulations (CMDP) ... The goal of the project is to increase ... proprietary buccal insulin spray product, thereby reducing the ...
(Date:9/22/2014)... Sept. 22, 2014  WIRB-Copernicus Group (WCG), the ... services for clinical research, announced today that its ... been reaccredited by the Association for the Accreditation ... to improve safeguards for clinical research participants. ... Deieso , Ph.D., commented, "It is of utmost ...
(Date:9/22/2014)... Synageva BioPharma Corp. ("Synageva") ... developing therapeutic products for rare disorders announced today ... Chief Operating Officer.  Reporting directly to Sanj ... Robert will oversee the planned global commercial launch ... LAL Deficiency, and will have responsibility for the ...
(Date:9/21/2014)... how to produce ultra-thin "diamond nanothreads" that promise extraordinary ... today,s strongest nanotubes and polymers. A paper describing this ... Badding, a professor of chemistry at Penn State University, ... of the journal Nature Materials . , "From ... because the threads we formed have a structure that ...
Breaking Biology Technology:Generex Collaborates with University Health Network for Buccal Insulin Project 2Generex Collaborates with University Health Network for Buccal Insulin Project 3Generex Collaborates with University Health Network for Buccal Insulin Project 4Western IRB (WIRB) Awarded AAHRPP Reaccreditation 2Synageva BioPharma Appoints Robert Bazemore As Chief Operating Officer 2Synageva BioPharma Appoints Robert Bazemore As Chief Operating Officer 3Synageva BioPharma Appoints Robert Bazemore As Chief Operating Officer 4Smallest possible diamonds form ultra-thin nanothreads 2Smallest possible diamonds form ultra-thin nanothreads 3Smallest possible diamonds form ultra-thin nanothreads 4
... via Single ... Platform, MirixaPro(SM), RESTON, Va. and WASHINGTON, Oct. ... creator of,the Diabetes Ten City Challenge and a partner in the ... that will,deliver all of APhA Foundation,s HealthMapRx commercial programs via,Mirixa. MirixaPro(SM) ...
... Oct. 9 eResearchTechnology,Inc. (eRT), (Nasdaq: ERES ... technology, ePRO and other services to the pharmaceutical,biotechnology, ... will release its 2008 third quarter results for ... 30, 2008 after the market closes.,After the release, ...
... CEL-SCI Corporation,(NYSE: CVM ) announced today ... facility for its lead drug Multikine(R). This dedicated,facility, ... Multikine that,will be used for CEL-SCI,s pivotal Phase ... head and neck cancer patients, and,subsequently for sale ...
Cached Biology Technology:Mirixa Corporation and the APhA Foundation Form Partnership 2Mirixa Corporation and the APhA Foundation Form Partnership 3eResearchTechnology, Inc. to Announce 2008 Third Quarter Results on October 30, 2008 2CEL-SCI Takes Delivery of New Manufacturing Facility 2
... MULTI-FUN Incubator is a compact benchtop ... a microprocessor controller with a large ... and agitation speed. Air circulation inside ... incubator. Temperature can be easily calibrated ...
Anti Autotaxin /ENPP2 , - (Rabbit)...
Mouse polyclonal antibody to TNPO2 - transportin 2 (importin 3, karyopherin beta 2b)...
...
Biology Products: