Navigation Links
Scientists construct first map of how the brain organizes everything we see
Date:12/19/2012

Our eyes may be our window to the world, but how do we make sense of the thousands of images that flood our retinas each day? Scientists at the University of California, Berkeley, have found that the brain is wired to put in order all the categories of objects and actions that we see. They have created the first interactive map of how the brain organizes these groupings.

The result achieved through computational models of brain imaging data collected while the subjects watched hours of movie clips is what researchers call "a continuous semantic space."

Some relationships between categories make sense (humans and animals share the same "semantic neighborhood") while others (hallways and buckets) are less obvious. The researchers found that different people share a similar semantic layout.

"Our methods open a door that will quickly lead to a more complete and detailed understanding of how the brain is organized. Already, our online brain viewer appears to provide the most detailed look ever at the visual function and organization of a single human brain." said Alexander Huth, a doctoral student in neuroscience at UC Berkeley and lead author of the study published today (Wednesday, Dec. 19) in the journal Neuron.

A clearer understanding of how the brain organizes visual input can help with the medical diagnosis and treatment of brain disorders. These findings may also be used to create brain-machine interfaces, particularly for facial and other image recognition systems. Among other things, they could improve a grocery store self-checkout system's ability to recognize different kinds of merchandise.

"Our discovery suggests that brain scans could soon be used to label an image that someone is seeing, and may also help teach computers how to better recognize images," said Huth, who has produced a video and interactive website to explain the science of what the researchers found.

It has long been thought that each category of object or action we see people, animals, vehicles, household appliances and movements is represented in a separate region of the visual cortex. In this latest study, UC Berkeley researchers found that these categories are actually represented in highly organized, overlapping maps that cover as much as 20 percent of the brain, including the somatosensory and frontal cortices.

To conduct the experiment, the brain activity of five researchers was recorded via functional Magnetic Resonance Imaging (fMRI) as they each watched two hours of movie clips. The brain scans simultaneously measured blood flow in thousands of locations across the brain.

Researchers then used regularized linear regression analysis, which finds correlations in data, to build a model showing how each of the roughly 30,000 locations in the cortex responded to each of the 1,700 categories of objects and actions seen in the movie clips. Next, they used principal components analysis, a statistical method that can summarize large data sets, to find the "semantic space" that was common to all the study subjects.

The results are presented in multicolored, multidimensional maps showing the more than 1,700 visual categories and their relationships to one another. Categories that activate the same brain areas have similar colors. For example, humans are green, animals are yellow, vehicles are pink and violet and buildings are blue. For more details about the experiment, watch the video above.

"Using the semantic space as a visualization tool, we immediately saw that categories are represented in these incredibly intricate maps that cover much more of the brain than we expected," Huth said.


'/>"/>

Contact: Yasmin Anwar
yanwar@berkeley.edu
510-643-7944
University of California - Berkeley
Source:Eurekalert

Related medicine news :

1. Berkeley Lab scientists developing quick way to id people exposed to ionizing radiation
2. Norwegian scientists win Perl-UNC Neuroscience Prize
3. New technology allows scientists to capture and preserve cancer cells circulating in the bloodstream
4. No more lying about your age: Scientists can now gauge skin’s true age with new laser technique
5. Stem cell sticky spots recreated by scientists
6. Singapore scientists identify new biomarker for cancer in bone marrow
7. Scientists ID Gene That Shows Progression in ALS Patients
8. Scientists train honey bees to stick out their tongues
9. NIH scientists reflect on gains in emerging infectious disease awareness, research and response
10. 2 UT Southwestern scientists honored as rising stars in Texas research
11. Drug resistant leukemia stem cells may be source of genetic chaos, Temple scientists find
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/29/2016)... Francisco, CA (PRWEB) , ... April 29, 2016 ... ... released fertility clinic data for 2014. Each year, reproductive endocrinologists are required to ... and SART, the main organization of professionals dedicated to the practice of assisted ...
(Date:4/29/2016)... ... April 29, 2016 , ... In its efforts of ... Services continues its successful franchise development and expansion as it welcomes Ferdie Vasquez of ... and administrative experience in his 32 years of working in various industries. He ...
(Date:4/28/2016)... ... 28, 2016 , ... The Dentists Insurance Company ... a letter of intent with Moda to acquire Dentists Benefits Insurance ... Started by dentists 36 years ago, TDIC focuses exclusively on supporting the dental ...
(Date:4/28/2016)... ... April 28, 2016 , ... CastCoverz!, America’s #1 trusted brand ... country's oldest waterproof cast protector . As the largest one-stop, orthopedic shop, ... of daily, night, weatherproof and waterproof covers for most orthopedic devices, including but ...
(Date:4/28/2016)... ... April 28, 2016 , ... The ARRS 2016 ... medical professionals from around the globe who attended a week’s worth of cutting-edge ... April 17 included the introduction of the 2016 ARRS Distinguished Educator, Dr. Gerald ...
Breaking Medicine News(10 mins):
(Date:4/28/2016)... , April 28, 2016   Acsis , a ... that leading IT market research and advisory firm IDC ... the IDC MarketScape: Worldwide Pharmaceutical Track and Trace Software ... report provides an assessment of the capabilities and business ... trace software market. Logo - http://photos.prnewswire.com/prnh/20160427/360791LOGO ...
(Date:4/28/2016)... , April 28, 2016 TapImmune,Inc. ... of innovative peptide and gene-based immunotherapeutics and vaccines for the ... be presenting at the 3rd Annual Growth Capital Expo ... th , 2016 at Caesars Palace in Las Vegas, Nevada.  ... on Wednesday, May 4 th by Dr. John ...
(Date:4/27/2016)... April 27, 2016  Hologic, Inc. (Nasdaq: ... results for the fiscal second quarter ended March ... of $0.24 increased 41.2%, and non-GAAP diluted EPS ... increased 5.8% on a reported basis, and 6.3% ... "We posted another good quarter, highlighted by 14.6% ...
Breaking Medicine Technology: