Navigation Links
Pioneering research helps to unravel the brain's vision secrets
Date:2/3/2013

A new study led by scientists at the Universities of York and Bradford has identified the two areas of the brain responsible for our perception of orientation and shape.

Using sophisticated imaging equipment at York Neuroimaging Centre (YNiC), the research found that the two neighbouring areas of the cortex -- each about the size of a 5p coin and known as human visual field maps -- process the different types of visual information independently.

The scientists, from the Department of Psychology at York and the Bradford School of Optometry & Vision Science established how the two areas worked by subjecting them to magnetic fields for a short period which disrupted their normal brain activity. The research which is reported in Nature Neuroscience represents an important step forward in understanding how the brain processes visual information.

Attention now switches to a further four areas of the extra-striate cortex which are also responsible for visual function but whose specific individual roles are unknown.

The study was designed by Professor Tony Morland, of York's Department of Psychology and the Hull York Medical School, and Dr Declan McKeefry, of the Bradford School of Optometry and Vision Science at the University of Bradford. It was undertaken as part of a PhD by Edward Silson at York.

Researchers used functional magnetic resonance imaging (fMRI) equipment at YNiC to pinpoint the two brain areas, which they subsequently targeted with magnetic fields that temporarily disrupt neural activity. They found that one area had a specialised and causal role in processing orientation while neural activity in the other underpinned the processing of shape defined by differences in curvature.

Professor Morland said: "Measuring activity across the brain with FMRI can't tell us what causal role different areas play in our perception. It is by disrupting brain function in specific areas that allows the causal role of that area to be assessed.

"Historically, neuropsychologists have found out a lot about the human brain by examining people who have had permanent disruption of certain parts of the brain because of injury to it. Unfortunately, brain damage seldom occurs at the spatial scale that allows the function of small neighbouring areas to be understood. Our approach is to temporarily disrupt brain activity by applying brief magnetic fields. When these fields are applied to one, small area of the brain, we find that orientation tasks are harder, while disrupting activity in this area's nearest neighbour only affected the ability to perceive shapes."

Dr McKeefry added: "The combination of modern brain scanning technology along with magnetic neuro-stimulation techniques provides us with a powerful means by which we can study the workings of the living human brain.

"The results that we report in this paper provide new insights into how the human brain embarks upon the complex task of analysing objects that we see in the world around us.

"Our work demonstrates how processing of different aspects of visual objects, such as orientation and shape, occurs in different brain areas that lie side by side. The ultimate challenge will be to reveal how this information is combined across these and other brain areas and how it ultimately leads to object recognition."


'/>"/>

Contact: David Garner
david.garner@york.ac.uk
44-019-043-22153
University of York
Source:Eurekalert

Related medicine news :

1. Pioneering research into rare neonatal diseases
2. UCLA Brain Injury Research Center gets NCAA funding for research on sports concussions
3. NIH awards $20 million over 5 years to train next generation of global health researchers
4. Researchers develop a new cell and animal model of inflammatory breast cancer
5. Researchers uncover a viable way for colorectal cancer patients to overcome drug resistance
6. Sexually abused boys at risk for more unsafe sex: UBC research
7. Researchers Find Gene Mutations That May Be a Key to Autism
8. LSUHSC research finds HPV-related head & neck cancers rising, highest in middle-aged white men
9. Researchers find evidence of banned antibiotics in poultry products
10. Presidential keynote address and new research highlights from the American Society of Pediatric Otolaryngology meeting
11. Scientific session and new research highlights
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/26/2016)... ... May 26, 2016 , ... Georgia State University ... specialty academic programs. , Answering to the increasing demand for curricular specializations, the ... law, and environmental and land use law. ,  , “The demand for lawyers ...
(Date:5/26/2016)... ... May 26, 2016 , ... The Woodlands at John Knox ... new model of care for living and healing, celebrated its grand opening, today. The ... a Real Home provided by Empowered Staff. , “This is an incredibly fulfilling time ...
(Date:5/26/2016)... ... May 26, 2016 , ... MadgeTech will be showcasing its line of ... Warner, New Hampshire at the MadgeTech headquarters. With products sold in more than 100 ... government agencies, including NASA. , In 2012, NASA strategically set up 17 RHTemp101A ...
(Date:5/26/2016)... ... ... An April Gallup survey found rising health care costs to be the top ... Living (SHSL) may not share those same worries thanks to a new bundled ... while holding the line on increasing their contributions, including premiums, deductibles and the portions ...
(Date:5/26/2016)... ... May 26, 2016 , ... Leadership ... solutions, today announced the organization has earned its ISO 13485 certification, indicating the ... compliant with all rules and policies associated with ISO quality standard 13485. ...
Breaking Medicine News(10 mins):
(Date:5/27/2016)... , May 27, 2016 ... the Dario™ Diabetes Management Tool, today announced that the Company,s ... the Marcum MicroCap Conference being held June 1-2 in ... Invitational, being held June 7-9 in Los Angeles, ... will discuss recent corporate and operational milestones, including the U.S. ...
(Date:5/27/2016)... Amarantus BioScience Holdings, Inc. (OTCQX: AMBS), ... Neurology and Orphan Diseases, today announced that President & CEO ... conferences: SeeThru Equity MicroCap Conference   ... City , NY When: Tuesday, May 31 st ... Where: Grand Hyatt Hotel, 109 East 42 nd ...
(Date:5/26/2016)... TARE (Transarterial Radio-embolization) Using ... and Overall Decreased Use of Hospital Resource ... specialist healthcare company, has today announced the publication ... of ISPOR (International Society for Pharmacoeconomics and Outcomes ... using yttrium-90 glass microspheres is associated with cost ...
Breaking Medicine Technology: