Navigation Links
Fruit fly’s visual map based entirely on genetic inputs

The visual maps in the brains of vertebrates and fruit fly denote what they see. Millions of neuron contacts comprise these visual maps// that need to be wired properly in the early stages for normal vision in the adult stage. A general notion is that visual maps are so intricate that they cannot only be genetically programmed but needs neurons or nerve cells’ activity in the brain.

In a new study published in the journal Current Biology, Drs. P. Robin Hiesinger, R. Grace Zhai and co-workers in the laboratory of Dr. Hugo Bellen, director of the Program in Developmental Biology at Baylor College of Medicine, found that this neuronal activity is not required for the formation of the visual map in Drosophila melanogaster, the most common form of fruit fly used in laboratories around the world.

"There is a genetic component (to formation of the vertebrate visual system)," said Bellen, who is also a Howard Hughes Medical Institute investigator. "The neurons in vertebrates are born and are genetically programmed to project into a certain brain region. This is followed by a dynamic phase where neuronal activity refines the visual map. In contrast, in flies the system seems to be completely hard-wired and only rely on genetic inputs."

"The most obvious difference between the insect and vertebrate brain is their size and the number of neurons and connections that need to be made. A possible explanation for the findings is that the fruit fly has many fewer neurons than vertebrates, and the system can therefore just rely on the genetic components in flies," said Bellen.

"In vertebrates, complexity is added because of the challenge of millions of neurons having to make billions of precise connections. You have to work with a gross topological map first, and neuronal activity refines this map later," he said.

The study adds to an ongoing debate about the extent to which brain wiring can be genetically programmed.
"We have t o be careful when we interpret these results in light of the complexity of the human brain," said Bellen. However, he said, "It is astonishing though how only a few thousand genes can program billions of synaptic connections."

Source-Eurekalert
GYT
'"/>




Related medicine news :

1. Benefits of Eating Whole Grains, Fruits and Vegetables
2. Benefits Of Fruits and Veggies
3. Fruits found To Be Good For Eyes
4. Eating Fruits And Vegetables Found to Fight Endometriosis
5. The Beneficial Effects Of Fruits and Vegetables
6. Slowing Cartilage Loss In Arthritis With Fruit Extracts
7. Fruits And Vegetables Have Arthritis Risk Reducing Property
8. High-Vegetable & Fruit Diet Reduce The Risk Of Pancreatic Cancer
9. Aloe Vera Coating For Fruits And Vegetables Preservation
10. Rich Diet Of Fruits & Vegetables Helps To Protect Against Lung Cancer
11. Fruits and vegetables found to interact with drugs in a dangerous way
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/21/2017)... (PRWEB) , ... September 21, 2017 , ... ... with offices serving communities in northern Alabama and Georgia, is embarking on an ... prevention by utilizing modern early detection methods. , US Breast Cancer statistics ...
(Date:9/20/2017)... ... September 20, 2017 , ... Collins Concrete Coatings announced that ... rely on safety and cleanliness. This unique flooring system uses silver ion technology ... for centuries for its antimicrobial properties. Unlike antibiotics, which kill specific microorganisms, silver ...
(Date:9/20/2017)... ... September 20, 2017 , ... ... company specializing in medical device compliance and commercialization, has just released a ... activities. , FDA is more adamant than ever about medical device, pharmaceutical, ...
(Date:9/20/2017)... Cleveland, Ohio (PRWEB) , ... September 20, 2017 ... ... commitment to customer service and innovation, the company recently unveiled a redesigned website. ... to further enrich the work of building owners, architects, contractors and other industry ...
(Date:9/20/2017)... ... September 20, 2017 , ... The Honey Pot Company is ... goal is to ignite conversation via social media and word-of-mouth regarding vaginal health, ... declared September “Humans with Vaginas” month, releasing a video celebrating the power of ...
Breaking Medicine News(10 mins):
(Date:9/5/2017)... -- Just 18 months after its February 2016 launch, market ... appointment of three new senior people to its rapidly ... and James Wright bring decades of ... Tammy Wynne joins as Director, Value ... has over ten years, experience in global market access ...
(Date:8/31/2017)... PM360,s annual Innovations Issue, published in ... innovations happening across the industry. Established six years ago, ... providing a comprehensive look at the newest and most ... innovative companies, startups, divisions, products, services, and strategies from ... "Everyone in this industry wants to do better—in all ...
(Date:8/25/2017)... -- Innovation Zed ( www.innovationzed.com ), an Irish medtech company, today announced that ... and Bassetlaw, England . The ... as part of a national NHS Test Bed programme exploring new models ... Innovation Zed ... InsulCheck Connect, a snap-on accessory for disposable insulin pen users, automatically collects ...
Breaking Medicine Technology: