HOME >> BIOLOGY >> NEWS
Two nerve cells in direct contact

Movements in space create in humans and animals so-called optical flow fields which are characteristic for the movement in question. In a forward movement, the objects flow by laterally, objects at the front increase in size and objects further away hardly change at all. At a higher level in the visual centre in the brain, there must be a computation of the visual information, so that animals can differentiate between their own movement and movement of their environment and are able to correct their course if necessary. It is important for the analysis of flow fields that the movement information from both eyes is merged so that the whole flow field can be assessed. In their current study, Karl Farrow, Jürgen Haag and Alexander Borst have for the first time proved the direct link between two nerve cells, one in each half of the brain, combining the movement signals from both the facetted eyes of a fly.

In the blow fly, the nerve cells that analyse optical flow fields, called tangential cells, are located in the lobula plate. There are only 60 of these tangential cells for each half of the brain and each of these 60 cells can be identified individually. The scientists in Martinsried have looked closely at one cell, the H2 cell. This cell exhibits a strong preference for rotational flow fields such as that which arises when the fly turns around its body's vertical axis. Interestingly, this cell seems initially to react only to the movements in front of its own eye (ipsilateral), but remain blind to movements in front of the other eye (contralateral). However, if the ipsilateral movement stimuli are combined with the contralateral, it is seen that the latter do indeed modulate the reactions to ipsilateral movement stimuli. "The preference of the H2 cell for rotational stimuli is due to a non-linear coordination of the movement stimuli from both eyes, and it was this non-linearity that we wanted to investigate further," said Alexander Borst.

The ne
'"/>

Contact: Eva Diehl
diehl@neuro.mpg.de
49-898-578-2824
Max-Planck-Gesellschaft
7-Nov-2006


Page: 1 2 3

Related biology news :

1. Natures weapon against nerve agents
2. Autism-related proteins control nerve excitability, researchers find
3. Gene therapy delivery of nerve growth factors reverses erectile dysfunction in animal model
4. Studies assess effectiveness of serotonin and nerve stimulants on irritable bowel syndromes
5. Growing nerve cells in 3-D dramatically affects gene expression
6. Study revises dynamins role in nerve cell function
7. Antidepressants stimulate new nerve cells in adult monkeys, may have implications for humans
8. Scientists identify key to integrating transplanted nerve cells into injured tissue
9. Deactivating protein may protect nerve fibers in MS
10. 3 proteins may play important role in nerve-cell repair
11. Stress and nerve cells survival in rats; finding may open window for depression treatment

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Two nerve cells direct contact

(Date:7/31/2014)... Census Bureau, Latinos are the largest minority group in ... Approximately one-third of Latinos are obese and are 1.2 ... Whites. , NYU College of Nursing student researcher ... identify the factors that contribute to this problem by ... on food patterns in Latina women recently published in ...
(Date:7/31/2014)... of the roughly 156,000 gas stations across the ... parts of underground gas storage tankscorrosion that could ... a source of drinking water. In recent years, ... rapidly corroding gas storage tank components such as ... use of gasoline-ethanol blends and the presence of ...
(Date:7/31/2014)... An experimental vaccine protected 100 percent of animal models ... difficile , which causes an intestinal disease that kills ... of print in Infection and Immunity . ... and non-human primates against the purified toxins produced by ... orogastric spore infection, a laboratory model that mimics the ...
Breaking Biology News(10 mins):NYU research looks to combat US Latina immigrant obesity 2NIST corrosion lab tests suggest need for underground gas tank retrofits 2C. difficile vaccine proves safe, 100 percent effective in animal models 2
(Date:7/31/2014)... The global market for molecular diagnostics is expected to ... new study by Grand View Research, Inc. Growing demand ... of advanced cancer diagnostic technologies are expected to be ... years. Moreover, the growing global base of geriatric population ... triggering lifestyle habits such as smoking and excessive alcohol ...
(Date:7/31/2014)... 31, 2014   BioLife Solutions , Inc. (NASDAQ: ... marketer of proprietary clinical grade hypothermic storage ... thermal shipping products for cells and tissues, today ... results will be released on Thursday, August 7, 2014, ... and live webcast at 4:30 p.m. ET that afternoon. ...
(Date:7/31/2014)... July 31, 2014 Boston’s Adult Stem ... flush with innovative adult stem cell biotechnologies. Currently ... and has three additional patent applications currently under examination ... patented inventions address two of the most vexing problems ... Adult stem cells are difficult to identify; and ...
(Date:7/30/2014)... , July 30, 2014  Regeneron Pharmaceuticals, Inc. ... today announced that the Companies intend to use a ... priority review voucher in connection with the Biologics License ... entitles the holder to designate a BLA for priority ... the filing date instead of the standard 10-month review. ...
Breaking Biology Technology:Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 2Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 3Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 4Molecular Diagnostics Market - Global Industry Size, Share, Trends, Analysis, Players, Opportunity, Outlook and Forecast From 2014 to 2020 5BioLife Solutions to Report Financial Results for Second Quarter 2014 and Provide Business Update on August 7, 2014 2The Adult Stem Cell Technology Center, LLC Launches A Marketing Campaign To License Adult Stem Cell Biotechnologies 2The Adult Stem Cell Technology Center, LLC Launches A Marketing Campaign To License Adult Stem Cell Biotechnologies 3Regeneron and Sanofi Announce Plan to Use Priority Review Voucher For Alirocumab U.S. FDA Submission 2Regeneron and Sanofi Announce Plan to Use Priority Review Voucher For Alirocumab U.S. FDA Submission 3Regeneron and Sanofi Announce Plan to Use Priority Review Voucher For Alirocumab U.S. FDA Submission 4Regeneron and Sanofi Announce Plan to Use Priority Review Voucher For Alirocumab U.S. FDA Submission 5Regeneron and Sanofi Announce Plan to Use Priority Review Voucher For Alirocumab U.S. FDA Submission 6
Cached News: