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, J├╝rgen 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:


(Date:3/8/2016)... , March 8, 2016   Valencell ... technology, today announced it has secured $11M in ... GII Tech, a new venture fund being launched ... additional participation from existing investors TDF Ventures and ... funds to continue its triple-digit growth and accelerate ...
(Date:3/3/2016)... MONTEREY, Calif. , March 3, 2016 /PRNewswire/ ... Partner, launched this week highlighting advancements in flexible, ... – a record setting attendance - have gathered ... in this fast-growing field of electronics. The Flex ... a focal point for companies, R&D organizations, and ...
(Date:3/2/2016)... March 2, 2016 ... addition of the  "Global Biometrics Market in ... ,     (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , , Global biometrics ... at a CAGR of around 27%   ... has announced the addition of the  "Global ...
Breaking Biology News(10 mins):
(Date:5/4/2016)... N.J. , May 4, 2016  Bayer ... its oncology compound Stivarga ® (regorafenib) tablets ... carcinoma (HCC) has met its primary endpoint of ... study, called RESORCE, evaluated the efficacy and safety ... has progressed after treatment with sorafenib. The safety ...
(Date:5/4/2016)... New York, NY (PRWEB) , ... May 04, ... ... growth, has leveraged recent innovations in biotechnology to help treat hormonal and stress ... hair loss, Nutrafol® has captured the hearts of key opinion leaders in the ...
(Date:5/3/2016)... ... 03, 2016 , ... Leading CEOs from biotech, pharmaceutical, and ... June 1st at The Four Seasons Hotel Boston. , The Boston CEO Conference ... exclusive access to key decision makers who influence deal making and investment. Attendees ...
(Date:5/3/2016)... -- - And Other Rising Companies - ... Competitor Biologics  - Biosimilar Drug Producers - ... Who are the most important and promising ... sales potentials? Discover, in our updated survey, organisations, outlooks ... revenue forecasting. Visiongain,s new study ...
Breaking Biology Technology:
Cached News: