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:4/25/2017)... ... April 25, 2017 , ... There is no better ... according to a special report in the May issue of Consumer Reports focused on ... quality ranking for results achieved during and after coronary bypass and aortic valve replacement ...
(Date:4/25/2017)... ... April 25, 2017 , ... ... the continuation of its strategic partnership with and platinum sponsorship of Global Spine ... the safe and effective management of complex spine deformity cases, particularly in children. ...
(Date:4/24/2017)... ... April 24, 2017 , ... ... Bring Your Own Device (BYOD) capabilities at Telehealth 2.0, the American Telemedicine Association’s ... bundles, which pairs medical devices with a pre-programmed tablet in a remarkably easy-to-use ...
(Date:4/24/2017)... ... April 24, 2017 , ... The Santana Telehealth Project ... 2017: Telehealth 2.0 — the American Telemedicine Association’s annual conference, on April 23 in ... for using telemedicine to improve the lives of the poor and underserved in other ...
(Date:4/24/2017)... , ... April 24, 2017 , ... As part of ... today to honor the victims of the Holocaust and Nazi persecution, Center for ... Hadamar and Auschwitz on its CMATH Champions trip to Germany and Poland next week. ...
Breaking Medicine News(10 mins):
(Date:4/20/2017)...  Zimmer Biomet Holdings, Inc. (NYSE and SIX: ZBH), ... it will be participating in the Deutsche Bank Securities ... in Boston, Massachusetts on Wednesday, ... a.m. Eastern Time. A live webcast of ... Relations website at http://investor.zimmerbiomet.com .  The webcast will ...
(Date:4/20/2017)...  CVS Pharmacy, the retail division of CVS ... design to enhance the retail customer experience with ... and expanded beauty selections paired with informational signage ... offerings. Together with its innovative digital programs, these ... experience at CVS Pharmacy.  "Pharmacy ...
(Date:4/20/2017)... April 20, 2017 Eyevensys, a ... first non-viral gene expression technology that enables the safe, ... to address a wide range of ophthalmic diseases, announces ... Healthcare products Regulatory Agency (MHRA) to advance its technology ... ...
Breaking Medicine Technology: