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:11/29/2016)... Nov. 29, 2016   Neurotechnology , ... object recognition technologies, today released FingerCell 3.0, ... recognition solutions that run on low-power, low-memory ... using less than 128KB of memory, enabling ... that have limited on-board resources, such as: ...
(Date:11/22/2016)... , November 22, 2016 According to the new ... Palm Print, Face, Vein, Signature, Voice), Multi-Factor), Component (Hardware and Software), Function ... by MarketsandMarkets, the market is expected to grow from USD 10.74 Billion ... of 16.79% between 2016 and 2022. Continue ... ...
(Date:11/17/2016)... , Nov. 17, 2016 Global Market Watch: ... Public Biobanks (Disease-Based Banks, Population-Based Banks and Academics) market is ... analysis for Private Biobanks shows the highest Compounded Annual Growth ... region during the analysis period 2014-2020. ... CAGR of 9.95% followed by Europe ...
Breaking Biology News(10 mins):
(Date:12/2/2016)... world leader in rapid infectious disease tests, introduced the Company,s newest product, the INSTI ... (Photo: http://photos.prnewswire.com/prnh/20161201/444905 ) Continue Reading ... ... , bioLytical was invited by the Clinton ... HIV Self Test to 350 pharmacy representatives in Nairobi and ...
(Date:11/30/2016)... ALBANY, New York , November 30, 2016 /PRNewswire/ ... exceptionally consolidated as a few players hold a dominant ... Lonza Group, Charles River Laboratories International, Inc., and Merck ... global market in 2015. Transparency Market Research observes that ... they are focused on development products that are do ...
(Date:11/30/2016)... 30, 2016  The Allen Institute for Cell ... first publicly available collection of gene edited, fluorescently ... key cellular structures with unprecedented clarity. Distributed through ... tools are a crucial first step toward visualizing ... what makes human cells healthy and what goes ...
(Date:11/30/2016)... BEIJING , Nov. 30, 2016 Novogene ... services and solutions with cutting edge next-generation sequencing (NGS) ... a USD $75 Million [515 Million RMB] B round ... Capital Management ( Shenzhen ) Co., Ltd. ... Innovation") and Shanghai Sigma Square Investment Center LP ("Sigma ...
Breaking Biology Technology:
Cached News: