Navigation Links
Color contrast is 'seen' by the brain early doors
Date:9/7/2007

Colour contrast is detected much earlier in the brain than previously thought, a new study shows.

Scientists at Durham University have confirmed that colour contrast is first detected by part of the brain called primary visual cortex, which is located at the very back of the head where visual information first enters the cortex of the brain. This was recently discovered to be the case in animals but has not been tested on human beings until now.

The research also confirms that the brain does most of the work in seeing the difference between colours, rather than the eye.

The team of neuropsychologists identified a patient with damage to this specific part of the brain. They showed the patient visual illusions in which the contrast between the coloured spots in the foreground and their background colour affected the way the spots looked. People with this part of the brain intact would see the spots as different as they look different on varying backgrounds. The patient was not able to detect that difference.

The research, which is published in the Proceedings of the National Academy of Sciences this week, makes a significant contribution to the understanding of how the brain functions.

Dr Robert Kentridge, lead researcher and lecturer in Durham Universitys Psychology Department explains: Colour is a product of our nervous system it is a pigment of our imagination. The colours that we see are more related to the materials that things are made of than the light reflected from them into our eyes. Making this happen involves many complex processes. One of the earliest involves seeing contrast between pairs of colours. We have found that this important step of seeing colour contrast happens much earlier in the brain than we had realised up to now.

The research study used a common approach in neuropsychology, that of extensive testing of a single patient, in this case one who had portions of the right primary visual cortex surgically removed in 1973 for treatment of abnormal blood vessels in the brain.

Professor Charles Heywood, who leads Durhams Psychology Department, added: People can distinguish between colours partly because of the contrast with its background. If someone has lost that ability through brain damage, it means that they might see colours as changing all the time. The colour of clothes, and indeed everything else we see, would change dramatically, depending on the colour of light which shines on them.


'/>"/>

Contact: Alex Thomas
media.relations@durham.ac.uk
01-913-346-075
Durham University
Source:Eurekalert

Related biology news :

1. Yellowstone microbes fueled by hydrogen, according to U. of Colorado study
2. Color-blind method opens new doors in DNA sequencing
3. ASU researchers finds novel chemistry at work to provide parrots vibrant red colors
4. Scientists develop new color-coded test for protein folding
5. New insight into people who see colors in letters and numbers
6. Overbearing colored light may reveal a second mechanism by which birds interpret magnetic signals
7. Change in gene may be underlying molecular defect in some colorectal cancers
8. Colorful bacteria more dangerous
9. Color perception is not in the eye of the beholder: Its in the brain
10. Protein behind autumn color splendor identified
11. U. of Colorado researcher identifies tracks of swimming dinosaur in Wyoming
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/18/2017)... 18, 2017  Socionext Inc., a global expert in SoC-based imaging ... server, the M820, which features the company,s hybrid codec technology. A ... Tera Probe, Inc., will be showcased during the upcoming Medtec Japan ... at the Las Vegas Convention Center April ... Click here for ...
(Date:4/13/2017)... , April 13, 2017 According to a ... Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, Deployment ... the IAM Market is expected to grow from USD 14.30 Billion in ... Rate (CAGR) of 17.3%. ... MarketsandMarkets Logo ...
(Date:4/11/2017)... 11, 2017 No two people are ... the New York University Tandon School of Engineering ... found that partial similarities between prints are common ... mobile phones and other electronic devices can be ... vulnerability lies in the fact that fingerprint-based authentication ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... ... advancing targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights that give ... Liposomal Nanoparticle), a technology developed in collaboration with Children’s Hospital Los Angeles ...
(Date:10/10/2017)... SANTA BARBARA, CALIFORNIA (PRWEB) , ... October 10, ... ... risk management, technological innovation and business process optimization firm for the life sciences ... the BoxWorks conference in San Francisco. , The presentation, “Automating GxP ...
(Date:10/9/2017)... ... October 09, 2017 , ... The Giving Tree Wellness Center ... the needs of consumers who are incorporating medical marijuana into their wellness and ... , As operators of two successful Valley dispensaries, The Giving Tree’s two founders, ...
(Date:10/6/2017)... ... 2017 , ... The HealthTech Venture Network (HTVN) is proud ... annual Conference where founders, investors, innovative practitioners and collaborators are invited to a ... early stage digital health and med tech companies. , This day-long event will ...
Breaking Biology Technology: