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:2/21/2017)... LONDON , February 21, 2017 ... um 70 Millionen US-Dollar wachsen. Nach einem Gespräch mit mehr ... es einige Hindernisse zu überwinden gilt, um diese Prognose ... ... unter anderem die Mobilisierung der finanziellen Mittel für die ...
(Date:2/13/2017)... , Feb. 13, 2017 Former 9/11 Commission ... Judiciary Committee, Janice Kephart of Identity Strategy ... Donald Trump,s "Executive Order: Protecting the Nation ... 27, 2017):  "As President Trump,s ,Travel Ban, ... has now essentially banned the travel ban, it is ...
(Date:2/8/2017)... BEDFORD, Mass., Feb. 7, 2017  Aware, Inc. (NASDAQ: ... services, today reported financial results for its quarter and year ... fourth quarter of 2016 was $3.9 million compared to $6.9 ... the fourth quarter of 2016 was $0.6 million compared to ... in the fourth quarter of 2016 was $0.5 million, or ...
Breaking Biology News(10 mins):
(Date:2/24/2017)... SAN DIEGO , Feb. 24, 2017  OncoSec ... intratumoral cancer immunotherapies, will host a Key Opinion Leader ... featured as an oral and poster presentation at the ... development plan. The KOL event will be held in-person ... 12:00 PM EST / 9:00 AM PST at the ...
(Date:2/23/2017)... -- Financial Highlights ... unaudited)Three Months Ended December 31,Twelve Months Ended December 31,20162015% ... $           300$   ... Product Revenue 3539(10)%9498(4)%Kuvan Net Product ... 756025%297303(2)%Vimizim Net Product Revenue ...
(Date:2/23/2017)... , Feb. 23, 2017 /PRNewswire/ - The Fight Against ... Cancer Research (OICR) are pleased to report that Fusion ... financing, with Johnson & Johnson Innovation – JJDC, Inc. ... venture groups HealthCap, TPG Biotechnology Partners, and Genesys Capital, ... ...
(Date:2/23/2017)... Feb. 23, 2017  In Atlanta, it seems everyone has ... culture intertwine to create an expressive and dynamic community unlike ... energy and contribute to it. With their ... Fairies seeks to carry on that tradition with a ... Atlanta salon is the newest of 13 nationwide ...
Breaking Biology Technology: