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:4/19/2016)... April 20, 2016 The new ... a compact web-based "all-in-one" system solution for all door ... reader or the door interface with integration authorization management ... control systems. The minimal dimensions of the access control ... the building installations offer considerable freedom of design with ...
(Date:4/14/2016)... April 14, 2016 BioCatch ... Detection, today announced the appointment of Eyal Goldwerger ... role. Goldwerger,s leadership appointment comes at a ... of the deployment of its platform at several of ... technology, which discerns unique cognitive and physiological factors, is ...
(Date:3/31/2016)... 2016  Genomics firm Nabsys has completed a financial ... Bready , M.D., who returned to the company in ... leadership team, including Chief Technology Officer, John Oliver ... Nurnberg and Vice President of Software and Informatics, ... Dr. Bready served as CEO of Nabsys from ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... /PRNewswire/ - FACIT has announced the creation of ... company, Propellon Therapeutics Inc. ("Propellon" or "the Company"), ... portfolio of first-in-class WDR5 inhibitors for the treatment ... represent an exciting class of therapies, possessing the ... cancer patients. Substantial advances have been achieved with ...
(Date:6/23/2016)... June 23, 2016  The Prostate Cancer Foundation (PCF) is pleased ... and faster cures for prostate cancer. Members of the Class of 2016 were ... Read More About the Class of 2016 PCF Young ... ... ...
(Date:6/23/2016)... ... 2016 , ... STACS DNA Inc., the sample tracking software company, today announced ... has joined STACS DNA as a Field Application Specialist. , “I am thrilled ... COO of STACS DNA. “In further expanding our capacity as a scientific integrator, Hays ...
(Date:6/23/2016)... , June 23, 2016 ... Hematology Review, 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 ... , the peer-reviewed journal from touchONCOLOGY, Andrew ... escalating cost of cancer care is placing an ... result of expensive biologic therapies. With the patents ...
Breaking Biology Technology: