Navigation Links
Color perception is not in the eye of the beholder: It's in the brain

and not others, a process often used by researchers to differentiate cell types under a microscope.

Imaging the living retina allowed Williams to shine light directly into the eye to see what wavelengths each cone reflects and absorbs, and thus to which color each is responsive. In addition, the technique allows scientists to image more than a thousand cones at once, giving an unprecedented look at the composition and distribution of color cones in the eyes of living humans with varied retinal structure.

Each subject was asked to tune the color of a disk of light to produce a pure yellow light that was neither reddish yellow nor greenish yellow. Everyone selected nearly the same wavelength of yellow, showing an obvious consensus over what color they perceived yellow to be. Once Williams looked into their eyes, however, he was surprised to see that the number of long- and middle-wavelength cones--the cones that detect red, green, and yellow--were sometimes profusely scattered throughout the retina, and sometimes barely evident. The discrepancy was more than a 40:1 ratio, yet all the volunteers were apparently seeing the same color yellow.

"Those early experiments showed that everyone we tested has the same color experience despite this really profound difference in the front-end of their visual system," says Hofer. "That points to some kind of normalization or auto-calibration mechanism--some kind of circuit in the brain that balances the colors for you no matter what the hardware is."

In a related experiment, Williams and a postdoctoral fellow Yasuki Yamauchi, working with other collaborators from the Medical College of Wisconsin, gave several people colored contacts to wear for four hours a day. While wearing the contacts, people tended to eventually feel as if they were not wearing the contacts, just as people who wear colored sunglasses tend to see colors "correctly" after a few minutes with the sunglasses. The volunteers' normal
'"/>

Source:University of Rochester


Page: 1 2 3

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. Colorful bacteria more dangerous
4. U. of Colorado researcher identifies tracks of swimming dinosaur in Wyoming
5. New U. of Colorado at Boulder flu chip may help combat future epidemics, pandemics
6. Cracking the perception code
7. UC Riverside psychologist explores human perception, finds wow factor
8. Face perception is modulated by sexual orientation
9. Patients and their doctors have different perceptions about HIV and its treatment
10. Altered perception of reward in human cocaine addiction
11. A puzzle piece found in unraveling the wiring of the brain
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Color perception not the eye the beholder the brain

(Date:12/15/2014)... 12, 2014 Research and Markets ... the "Global Facial Recognition Market 2015-2019" ... http://photos.prnewswire.com/prnh/20130307/600769 Facial recognition is ... Facial recognition system measures the overall facial feature ... mouth, and the distance between eyes. Facial recognition ...
(Date:12/11/2014)... 2014  Data Sciences International (DSI), the global ... new series of digital telemetry implants to meet ... series, part of the PhysioTel™ Digital platform, was ... physiologic data when incorporating functional endpoints into repeat-dose ... toxicology studies has evolved from short ECG strips ...
(Date:12/10/2014)... SAN DIEGO , Dec. 9, 2014 ... and collaboration catalyst that provides the connective tissue that ... by enabling them to easily share client-level information; earned ... Foundation to expand to organizations serving seniors aging in ... San Diego" partner on December 11 th 4-6p. ...
Breaking Biology News(10 mins):Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3New telemetry implants expected to change how large animal toxicology studies are conducted 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4
... pollen next, you have to literally think like one. , ... are more likely to stick with it rather than invest ... student at the University of Wisconsin-Milwaukee (UWM). , Flanigan ... bees as they gather pollen ?which plant species the bees ...
... five-year, $1 million grant from the National Cancer Institute, a ... improve the effectiveness of a drug that he developed ... Waldemar Debinski, M.D., Ph.D., pioneered a method to destroy cells ... The drug is currently being tested in clinical trials and ...
... research team led by scientists at the Broad Institute of ... kind of genetic "roadmap" that can connect human diseases with ... new drugs work in human cells. Called the "Connectivity Map," ... September 29 issue of Science and in separate publications in ...
Cached Biology News:Researchers find that bumblebees' flower choice matters 2Researchers find that bumblebees' flower choice matters 3Researchers find that bumblebees' flower choice matters 4Scientist works to improve treatment for brain tumors 2Genetic 'roadmap' charts links between drugs and human disease 2Genetic 'roadmap' charts links between drugs and human disease 3
(Date:12/19/2014)... 2014  Decision Resources Group finds that the ... grow moderately through 2023 as the aging population, increasing ... dental biomaterials all spur procedure volumes. Growth will be ... China and India , ... reach for a larger proportion of the population. ...
(Date:12/19/2014)... , Dec. 18, 2014 Relmada Therapeutics, ... for the treatment of chronic pain, announced the results ... "This was a transformational year in Relmada,s ... future for our company," said Sergio Traversa , ... we have executed on key financial, human resource and ...
(Date:12/17/2014)... USA (PRWEB) December 16, 2014 ... manager at Philipps- Universität Marburg’s Department of Physics, ... photonics, in the newly released SPIE Women ... never be too shy to ask questions.” , ... technology, engineering, and mathematics) occupations ranging from university ...
(Date:12/17/2014)... Long Beach, CA (PRWEB) December 17, 2014 ... Technology, Inc. to provide a larger packaged waste water ... district in King Abdullah Economic City (KAEC). Two years ... for EMAAR’s Jeddah Gate Development, serving two residential towers ... plant capacity is over a quarter million gallons per ...
Breaking Biology Technology:Asia Pacific Dental Biomaterial Market Will Grow Strongly Through 2023 2Asia Pacific Dental Biomaterial Market Will Grow Strongly Through 2023 3Relmada Therapeutics Announces Results of Annual Shareholders Meeting 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 3
... ... ... ... ...
... failure affects the surface of an individual heart muscle ... technique developed at Imperial College London. The findings may ... can slow the development of heart failure, and to ... and abnormal heart rhythms. Heart failure is ...
... ... molding, two-material molding and micro-molding for medical device components and assemblies, has promoted Greg ... ... single-source provider of silicone molding, two-material molding and micro-molding for medical device components and ...
Cached Biology Technology:Shire Announces FDA Approval of VPRIV(TM) (velaglucerase alfa for injection) for the Treatment of Type 1 Gaucher Disease 2Shire Announces FDA Approval of VPRIV(TM) (velaglucerase alfa for injection) for the Treatment of Type 1 Gaucher Disease 3Shire Announces FDA Approval of VPRIV(TM) (velaglucerase alfa for injection) for the Treatment of Type 1 Gaucher Disease 4Shire Announces FDA Approval of VPRIV(TM) (velaglucerase alfa for injection) for the Treatment of Type 1 Gaucher Disease 5Shire Announces FDA Approval of VPRIV(TM) (velaglucerase alfa for injection) for the Treatment of Type 1 Gaucher Disease 6Shire Announces FDA Approval of VPRIV(TM) (velaglucerase alfa for injection) for the Treatment of Type 1 Gaucher Disease 7Shire Announces FDA Approval of VPRIV(TM) (velaglucerase alfa for injection) for the Treatment of Type 1 Gaucher Disease 8Shire Announces FDA Approval of VPRIV(TM) (velaglucerase alfa for injection) for the Treatment of Type 1 Gaucher Disease 9Shire Announces FDA Approval of VPRIV(TM) (velaglucerase alfa for injection) for the Treatment of Type 1 Gaucher Disease 10Researchers gain detailed insight into failing heart cells using new nano technique 2Researchers gain detailed insight into failing heart cells using new nano technique 3Riemer Named President of Medical Device Manufacturer MRPC 2
... from frozen embedded tissue blocks, which are ... ensure the highest quality. Tissues of each ... sectioned at a thickness of 7microns and ... (3-5mm in diameter) in comparison to core ...
... microarrays are derived from Paraffin embedded tissue ... control procedures to ensure the highest quality. ... in one block, sectioned at a thickness ... slides. Sections are large (3-5mm in diameter) ...
... Zyagen tissue microarrays are derived from ... to rigorous quality control procedures to ensure ... are manually assembled in one block, sectioned ... mounted on coated slides. Sections are large ...
... DNA Engine Opticon real-time PCR detection system ... fluorescence excitation (450-495 nm) and a photomultiplier ... Opticon system is built on an DNA ... thermal gradient feature. This item includes the ...
Biology Products: