Navigation Links
Daydreaming simulated by computer model

ers began with a process for simulating small groups of neurons, including factors that decrease or increase the likelihood that a group of cells will send a signal.

"In a way, we treated small regions of the brain like cognitive units: not as individual cells but as groups of cells," said Gustavo Deco, PhD, professor and head of the Computational Neuroscience Group in Barcelona. "The activity of these cognitive units sends out excitatory signals to the other units through anatomical connections. This makes the connected units more or less likely to synchronize their signals."

Based on data from brain scans, researchers assembled 66 cognitive units in each hemisphere, and interconnected them in anatomical patterns similar to the connections present in the brain.

Scientists set up the model so that the individual units went through the signaling process at random low frequencies that had previously been observed in brain cells in culture and in recordings of resting brain activity.

Next, researchers let the model run, slowly changing the coupling, or the strength of the connections between units. At a specific coupling value, the interconnections between units sending impulses soon began to create coordinated patterns of activity.

"Even though we started the cognitive units with random low activity levels, the connections allowed the units to synchronize," Deco said. "The spatial pattern of synchronization that we eventually observed approximates very wellabout 70 percentto the patterns we see in scans of resting human brains."

Using the model to simulate 20 minutes of human brain activity took a cluster of powerful computers 26 hours. But researchers were able to simplify the mathematics to make it possible to run the model on a typical computer.

"This simpler whole brain model allows us to test a number of different hypotheses on how the structural connections generate dynamics of brain function at res

Contact: Michael C. Purdy
Washington University School of Medicine

Page: 1 2 3

Related biology news :

1. Computer modeling technique goes viral at Brandeis
2. Computer simulations yield clues to how cells interact with surroundings
3. Computer model may help athletes and soldiers avoid brain damage and concussions
4. Computer modeling reveals how surprisingly potent hepatitis C drug works
5. New supercomputer to aid genomics research
6. New supercomputer coming to EMSL this summer, supplied by Atipa Technologies
7. Virginia Tech computer scientists develop new way to study molecular networks
8. Iowa State computer, electrical engineers working to help biologists cope with big data
9. How computers push on the molecules they simulate
10. Total donates high-speed computer cluster to UH
11. A better thought-controlled computer cursor
Post Your Comments:
(Date:9/2/2014)... the Tithonian Konservat-Lagersttte of lithographic limestone is well ... emblematic fossils from that area (for example, Archaeopteryx). ... fossil insects in the French equivalent of these ... representing the oldest known water treader. , Despite ... outcrops, fewer fossils have been obtained from the ...
(Date:9/1/2014)... Boston, MA ─ Dietary quality in the U.S. has ... reduced trans fat intakebut overall dietary quality remains poor ... groups, according to a new study from Harvard School ... most direct evidence to date that the extensive efforts ... quality are having some payoff, but it also indicates ...
(Date:9/1/2014)... BOSTON (September 1, 2014, 10:20 AM EDT) It ... healthy low-calorie foods over unhealthy higher-calorie foods, according to ... Human Nutrition Research Center on Aging (USDA HNRCA) at ... today in the journal Nutrition & Diabetes , ... suggests that it is possible to reverse the addictive ...
Breaking Biology News(10 mins):Exceptionally well preserved insect fossils from the Rhône Valley 2Quality of US diet shows modest improvement, but overall remains poor 2Quality of US diet shows modest improvement, but overall remains poor 3Training your brain to prefer healthy foods 2
... 24, 2012 (BRONX, NY) "It,s in their genes" ... that allow centenarians to reach age 100 and beyond. ... offer a physiological advantage such as high levels of HDL ... Medicine and Ferkauf Graduate School of Psychology ...
... SAN FRANCISCO, May 24, 2012 -- The San ... $1.5 million education grant from Howard Hughes Medical Institute ... teaching skills and explore new resources and new ways ... Hughes Medical Institute Undergraduate Science Education Award will support ...
... for Species Exploration at Arizona State University and a committee ... the top 10 new species described in 2011. This is ... which was released May 23 to coincide with the anniversary ... was responsible for the modern system of plant and animal ...
Cached Biology News:'Personality genes' may help account for longevity 2SF State biology department receives $1.5 million to support science teaching 2Top 10 new species list draws attention to diverse biosphere 2Top 10 new species list draws attention to diverse biosphere 3Top 10 new species list draws attention to diverse biosphere 4Top 10 new species list draws attention to diverse biosphere 5Top 10 new species list draws attention to diverse biosphere 6
(Date:8/31/2014)... Texas (PRWEB) August 31, 2014 ... the current state of the Epoxy Hardener ... a basic overview of the industry, including definitions, ... and Chinese domestic market analysis are provided with ... landscape of the market. A comparison between the ...
(Date:8/29/2014)... August 29, 2014 The global ... billion in 2019. It is expected to grow ... 2019, and was valued at $1.8 billion in ... Transparency Market Research. , For more information regarding ... . , The research report, titled “Companion Diagnostics ...
(Date:8/29/2014)... Hills, NY (PRWEB) August 29, 2014 ... Burnt Hills Veterinary Hospital are seeking candidates to participate ... dogs with osteoarthritis. The ultimate goal of this ... donor stem cells into one or two arthritically affected ... treated joints. , Candidates for the current investigational ...
(Date:8/29/2014)... San Antonio, TX (PRWEB) August 29, 2014 ... 9001:2008 and ISO 13485:2003 certified, GAMP® 5 compliant ... been awarded an international Phase II clinical trial ... non-Hodgkin’s lymphoma. , Throughout this trial, Intrinsic Imaging ... but not limited to, protocol and charter development, ...
Breaking Biology Technology:Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at 2Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at 3Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 3Burnt Hills Veterinary Hospital Seeks Candidates for an Investigational Study of Stem Cells for Dogs with Arthritis 2Intrinsic Imaging Awarded Phase II Clinical Trial to Assess New Treatment for Non-Hodgkin’s Lymphoma 2
... American Oriental,Bioengineering, Inc. (NYSE: AOB ) today ... results on Monday, August 11, 2008, after the,market closes., ... 5:00 pm ET on August 11,2008 to discuss its ... by dialing 1-800-599-9816 or 1-617-847-8705 for,international callers, access code: ...
... X-ray Source as One, of the 100 ... SUNNYVALE, Calif., July 24 Xoft, Inc. today announced,that ... been selected to,receive an R&D 100 Award from R&D ... Established by the editors of R&D,Magazine in 1963, the ...
... Conn., July 24 Cara Therapeutics, Inc.,announced ... million of additional funding,to its original $24 ... in 2007.,The round was led by new ... Connecticut Innovations. Previous investors participating,in the round ...
Cached Biology Technology:Xoft Recognized With R&D 100 Award 2Xoft Recognized With R&D 100 Award 3Cara Therapeutics Secures $12.3 Million in Series C Extension Financing 2