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:11/28/2016)... LONDON , Nov. 28, 2016 ... at a rate of 16.79%" The biometric system ... to grow further in the near future. The biometric ... 32.73 billion in 2022, at a CAGR of 16.79% ... biometrics system, integration of biometric technology in smartphones, rising ...
(Date:11/22/2016)... According to the new market research report "Biometric System Market by Authentication ... (Hardware and Software), Function (Contact and Non-contact), Application, and Region - Global ... from USD 10.74 Billion in 2015 to reach USD 32.73 Billion by ... Continue Reading ... ...
(Date:11/21/2016)... 21, 2016   Neurotechnology , a provider ... today announced that the MegaMatcher On Card fingerprint ... for the NIST Minutiae Interoperability Exchange (MINEX) ... mandatory steps of the evaluation protocol. ... test of fingerprint templates used to establish compliance ...
Breaking Biology News(10 mins):
(Date:12/8/2016)... , ... December 08, 2016 , ... ... the business of innovation is taking over sports. On Thursday, December 15th a ... how technology is disrupting the playing field at a Smart Talk session. Smart ...
(Date:12/8/2016)... SAN DIEGO , Dec. 8, 2016 /PRNewswire-USNewswire/ ... treatments for congestive heart failure and type 2 ... license for a novel adeno-associated virus (AAV) vector ... Kay , M.D., Ph.D., at Stanford University. The ... of its paracrine gene therapy product pipeline. ...
(Date:12/8/2016)... ... December 08, 2016 , ... ... that provide essential device-to-computer interconnect using USB or PCI Express, announced the FOMD-ACV-A4, ... The FOMD-ACV-A4 is a small, thin, SODIMM-style module that fits a standard 204-pin ...
(Date:12/8/2016)...  Anaconda BioMed S.L., a pre-clinical stage medical device ... neuro-thrombectomy system for the treatment of Acute Ischemic Stroke ... to join its Scientific Advisory Board (SAB). The SAB ... scientific and clinical experts to Anaconda BioMed S.L., as ... ® to its clinical phase. The SAB is ...
Breaking Biology Technology: