Navigation Links
Scientists find color vision system independent of motion detection
Date:3/19/2008

The vision system used to process color is separate from that used to detect motion, according to a new study by researchers at New York Universitys Center for Developmental Genetics and in the Department of Genetics and Neurobiology at Germanys University of Wrzburg. The findings, which appear in the latest issue of the Proceedings of the National Academy of Sciences, run counter to previous scholarship that suggested motion detection and color contrast may work in tandem.

The studys authors are: Claude Desplan of NYUs Center for Developmental Genetics; Reinhard Wolf and Martin Heisenberg of the University of Wrzburg; and Satoko Yamaguchi, who holds appointments at both institutions.

Whether motion vision uses color contrast is a controversial issue that has been investigated in several species--from insects to humans. In human vision, it had been widely believed that color and motion were processed by parallel pathways. More recently, however, the complete segregation of motion detection and color vision came into question.

To explore this matter, the NYU and University of Wrzburg researchers examined the fruit fly Drosophila. Fruit flies development is well-understood by biologists and therefore serves as an appropriate focus for analyses. Specifically, they monitored Drosophilas optomotor response to moving color stimuli in both normal and mutant flies, with some of the mutant flies lacking the photoreceptors necessary for motion detection and others without the photoreceptors needed to process color.

The results showed that flies lacking the photoreceptors for detecting color showed the same ability to detect motion as normal flies. The researchers then concluded that the color channel does not contribute to motion detection.

The finding that motion detection is independent of color contrast is somewhat counterintuitive, said NYUs Desplan. Color is thought to increase the salience of objects, such as red fruits in the green foliage of trees.

However, our results in the fly demonstrate that color is strictly excluded from processing directional motion information, which suggests two separate functional pathways, he added. Whether, inversely, the motion detection system is involved in color vision in Drosophila remains to be determined.


'/>"/>

Contact: James Devitt
james.devitt@nyu.edu
212-998-6808
New York University
Source:Eurekalert

Related biology news :

1. UK scientists working to help cut ID theft
2. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
3. Comet probes reveal evidence of origin of life, scientists claim
4. Scientists link fragile X tremor/ataxia syndrome to binding protein in RNA
5. Male elephants get photo IDs from scientists
6. Scientists retrace evolution with first atomic structure of an ancient protein
7. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
8. Carnegie Mellon scientists develop nanogels that enable controlled delivery of carbohydrate drugs
9. Clemson scientists shed light on molecules in living cells
10. Scientists tackle mystery mountain illness
11. T. rex quicker than Becks, say scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/28/2016)... BANGALORE, India , April 28, 2016 ... subsidiary of Infosys (NYSE: INFY ), and Samsung ... global partnership that will provide end customers with a ... and payment services.      (Logo: http://photos.prnewswire.com/prnh/20130122/589162 ... for financial services, but it also plays a fundamental part ...
(Date:4/15/2016)... , April 15, 2016  A new ... make more accurate underwriting decisions in a fraction ... timely, competitively priced and high-value life insurance policies ... screenings. With Force Diagnostics, rapid testing ... lifestyle data readings (blood pressure, weight, pulse, BMI, ...
(Date:3/31/2016)... PROVIDENCE, R.I. , March 31, 2016  Genomics ... leadership of founding CEO, Barrett Bready , M.D., ... addition, members of the original technical leadership team, including ... Vice President of Product Development, Steve Nurnberg and Vice ... have returned to the company. Dr. Bready ...
Breaking Biology News(10 mins):
(Date:5/27/2016)... ... 27, 2016 , ... Weeks after hosting a carpal tunnel syndrome workshop with ... surgeon and founder of the Fitzmaurice Hand Institute, has announced the addition of MRI ... state-of-the-art technology and only 1 of about 3 currently available in the United States. ...
(Date:5/26/2016)... Mich. , May 26, 2016  Agriculture nutrients ... Des Moines, Iowa is running their ... Lake Erie and coastal regions ... key to preventing this widespread issue. NECi ... Upper Peninsula, developed a new, easy to ...
(Date:5/26/2016)... , ... May 26, 2016 , ... ... company, today announced several positive developments that position the Company for the future. ... of the transaction, Craig F. Kinghorn has been appointed Chairman of the Board, ...
(Date:5/25/2016)... ... 25, 2016 , ... Founder of the Fitzmaurice Hand Institute ... surgery of the hand by the National Board of Physicians and Surgeons, as ... beyond in his pursuit of providing the most comprehensive, effective treatment for his ...
Breaking Biology Technology: