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."


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:

(Date:6/27/2016)... ... June 27, 2016 , ... recently awarded their highest five-star rating ... Millions of individuals in the United States and Canada wear eyeglasses. Once considered to ... correct vision and make a fashion statement. Even celebrities use glasses as a way ...
(Date:6/26/2016)... , ... June 26, 2016 , ... Brent Kasmer, a legally blind and certified personal ... personalized through a fitness app. The fitness app plans to fix the two major problems ... offer a one size fits all type program , They don’t eliminate all ...
(Date:6/25/2016)... Viejo, California (PRWEB) , ... June 25, 2016 , ... ... to fit their specific project," said Christina Austin - CEO of Pixel Film Studios. ... fully customizable and all within Final Cut Pro X . Simply select a ...
(Date:6/25/2016)... ... June 25, 2016 , ... Conventional wisdom preaches the benefits ... terms of the latter, setting the bar too high can result in disappointment, perhaps ... slow progress toward their goal. , Research from reveals that ...
(Date:6/24/2016)... ... June 24, 2016 , ... ... Sessions in Dallas that it will receive two significant new grants to support ... as PHA marked its 25th anniversary by recognizing patients, medical professionals and scientists ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... 23, 2016  MedSource announced today that it ... software solution of choice.  This latest decision demonstrates ... to their clients by offering a state-of-the-art electronic ... establishes nowEDC as the EDC platform of choice ... clients.  "nowEDC has long been a preferred EDC ...
(Date:6/23/2016)... BEVERLY HILLS, Calif. , June 23, 2016 ... faced the many challenges of the current process. Many of ... option because of the technical difficulties and high laboratory costs ... would have to offer it at such a high cost ... to afford it. Dr. Parsa Zadeh , ...
(Date:6/23/2016)... startling report released today, National Safety Council research shows ... plan to eliminate prescription opioid overdoses. Prescription Nation ... the worst drug crisis in recorded U.S. history, assigned a "Making ... , New Mexico , Tennessee ... states, three – Michigan , Missouri ...
Breaking Medicine Technology: