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:1/31/2017)... Jan. 31, 2017  Spero Therapeutics, LLC, a ... the treatment of bacterial infections, today announced it ... candidates from Pro Bono Bio Ltd (PBB) to ... multi-drug resistant forms of Gram-negative bacteria.   The assets ... Ltd, a PBB group company. "The ...
(Date:1/24/2017)... Jan. 24, 2017 Biopharm Reports has ... laboratory use of nuclear magnetic resonance spectroscopy (NMR). ... and profiled current practices, developments, trends and end-user ... as growth and opportunities. These areas include growth ... instruments, needs and innovation requirements, hyphenated NMR techniques, ...
(Date:1/19/2017)... , Jan. 19, 2017 ... user experience and security for consumer electronics, and ... payment processing systems and cybersecurity solutions, today announced ... enterprises and financial institutions worldwide to bolster security ... the end-to-end secure user authentication platforms they offer, ...
Breaking Biology News(10 mins):
(Date:2/24/2017)... ... February 24, 2017 , ... ... can be safely completed in an ambulatory surgery center (ASC) with satisfactory clinical ... and previous two-year TDR studies. , Jake Lubinski, president of AxioMed, commented ...
(Date:2/24/2017)... San Diego, Calif. (PRWEB) , ... February 24, 2017 , ... ... African food and wine scene. Making stops in several cities, she gained a ... Her culinary adventure began in Stellenbosch, a town in South Africa’s Western Cape province. ...
(Date:2/24/2017)... , Feb. 24, 2017  Aethlon Medical, Inc. (Nasdaq: ... authored by its Chairman and CEO, Jim Joyce ... Munich Security Conference last Saturday, Bill Gates ... kill more people than nuclear weapons. Mr. Gates expressed ... U.K. intelligence agencies, that scientific terrorists have access to ...
(Date:2/24/2017)... , Feb. 24, 2017  Driven by consumers, ... are now the fastest growing categories, finds the ... Actives in Personal Care: Multi-regional Market Analysis and ... management consulting firm Kline. "Biotechnology actives ... make them more effective for skin and hair ...
Breaking Biology Technology: