About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

Color Contrast is 'seen' by the Brain Early Doors

by Medindia Content Team on September 10, 2007 at 7:31 PM
Font : A-A+

Color Contrast is 'seen' by the Brain Early Doors

Scientists at Durham University have proved that color contrast is detected much earlier in the brain than previous considerations.

The fact that color contrast is first detected by the 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 which was recently established in the case of animals have been confirmed even with human beings by the scientists at Durham University.

Advertisement

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.
Advertisement

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 University's 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 Durham's 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."

Source: Eurekalert
SRM/J
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Advertisement
News Category
What's New on Medindia
Cochlear Implants may Consequently Drive Hearing Loss
E-cigarettes Use Linked to Erectile Dysfunction
Memory Loss - Can it be Recovered?
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

More News on:
Parkinsons Disease Parkinsons Disease Surgical Treatment Brain Brain Facts Ataxia Colors and Moods Language Areas in The Brain Ways to Improve your Intelligence Quotient (IQ) 

Recommended Reading
A New 60 Second Test can Detect Brain Diseases
A 60 second test that analyses the tiny magnetic fields produced by neuron activity in the brain ......
Removing Harmful Iron from Brain Prevents Neurological Diseases
A team of chemists are developing ways to bind iron in the brain to fight the neurological damage .....
Ataxia
Ataxia affects coordination. Gait becomes unstable and the patient loses balance. The cerebellum or ...
Colors and Moods
Study of the psychology of color, technically termed as chromology delves into the influence of colo...
Language Areas in The Brain
The mechanism of how human brain processes the language to express and comprehend the verbal, writte...
Parkinsons Disease
Parkinson’s disease is a neurodegenerative disease caused by progressive dopamine brain cells loss. ...
Ways to Improve your Intelligence Quotient (IQ)
Intelligence quotient (IQ) is a psychological measure of human intelligence. Regular physical and me...

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use