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:2/23/2017)... Denver, Colorado (PRWEB) , ... February 23, 2017 ... ... Dialog Magazine, an exciting, new, interactive publication where generations converge and explore the ... to expand their worldview, Dialog Magazine enables readers to gain understanding, increase empathy, ...
(Date:2/23/2017)... ... (PRWEB) February 23, ... the nation to come together to combine its favorite springtime ... its favorite fruit – apples! To celebrate National Nutrition Month, ... the “Apple Madness” bracket tournament – a five-week, five-round online ...
(Date:2/23/2017)... ... 23, 2017 , ... Thomas Vas-Don suffered from severe injury due ... was able to successfully recover. In “ Origin & Insertion Charts for Massage Therapists ... the principals of massage, anatomy , trigger points and referral pain patterns ...
(Date:2/22/2017)... ... February 22, 2017 , ... Stem cell therapy has ... technology is so cutting edge, in fact, the U.S. Food and Drug Administration ... However, successful patient outcomes in certain clinical stem cell procedures have shown that ...
(Date:2/22/2017)... ... 2017 , ... Giving patients with diabetes customized coaching sessions, ... hospital admissions, and better blood pressure and glycemic control, a new study ... be found here . , The study comes as health plans increasingly ...
Breaking Medicine News(10 mins):
(Date:2/23/2017)... , Feb. 23, 2017 Research and ... Analysis and Strategies - 2016" report to their offering. ... The latest research ... data and benchmarks in the global Fibromyalgia market. The ... the key drugs marketed for Fibromyalgia and their clinical attributes? How ...
(Date:2/23/2017)... , Feb 23, 2017 Research and Markets ... & Trends - Industry Forecast to 2025" report to their ... The ... around 6.9% over the next decade to reach approximately $47.6 billion ... estimates and forecasts for all the given segments on global as ...
(Date:2/23/2017)...  MiMedx Group, Inc. (NASDAQ: MDXG), the leading regenerative ... to develop and market advanced products and therapies for ... and Dental sectors of healthcare, today announced its record ... December 31, 2016. Full Year 2016 Highlights ... increase over full year 2015 revenue ...
Breaking Medicine Technology: