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:6/25/2016)... Canada (PRWEB) , ... June 25, 2016 , ... Conventional ... pursuit of success. In terms of the latter, setting the bar too high can ... risk more than just slow progress toward their goal. , Research from ...
(Date:6/24/2016)... ... ... crisis. Her son James, eight, was out of control. Prone to extreme mood shifts and ... him, he couldn’t control his emotions,” remembers Marcy. “If there was a knife on ... say he was going to kill them. If we were driving on the freeway, ...
(Date:6/24/2016)... , ... June 24, 2016 , ... Comfort Keepers® of ... Cancer Society and the Road To Recovery® program to drive cancer patients to and ... other adults to ensure the highest quality of life and ongoing independence. Getting ...
(Date:6/24/2016)... ... June 24, 2016 , ... The Haute Beauty ... Barry M. Weintraub as a prominent plastic surgeon and the network’s newest partner. ... and the most handsome men, look naturally attractive. Plastic surgery should be invisible.” ...
(Date:6/24/2016)... ... June 24, 2016 , ... Venture Construction Group (VCG) ... held on June 20th at the Woodmont Country Club at 1201 Rockville Pike, Rockville, ... dedicated to helping service members that have been wounded in battle and their families. ...
Breaking Medicine News(10 mins):
(Date:6/26/2016)... , June 27, 2016  VMS Rehab Systems, Inc. ... will take whatever measures required to build a strong ... which is currently listed on the OTC Markets-pink current ... Chairman and CEO, "We are seeing an anomaly in ... understand, not only by the Company, but shareholders and ...
(Date:6/24/2016)... June 24, 2016  Consumers have taken a ... have placed more emphasis on patient outcomes. ... programs in the pharmaceutical industry have evolved beyond ... pharmaceutical companies are focusing on becoming more patient-oriented ... products and services that improve health. ...
(Date:6/24/2016)... , June 24, 2016  Global Blood ... biopharmaceutical company developing novel therapeutics for the treatment ... today announced the closing of its previously announced ... stock, at the public offering price of $18.75 ... offering were offered by GBT. GBT estimates net ...
Breaking Medicine Technology: