Navigation Links
Why nerve cells work faster than the theory allows

With accuracy unknown until now, researchers from the Max Planck Institute for Dynamics and Self-Organization and the Bernstein Center for Computational Neuroscience in Göttingen together with the neurophysiologist Maxim Volgushev from the Ruhr-Universität Bochum have analyzed, by which rules, the nerve cells in the cerebral cortex decide to send out impulses.

They surprisingly found, that the high flexibility and speed with which these cells work cannot be explained using the present, central model of neurophysiology, the Hodgkin-Huxley model. Their findings suggest that the sodium channels, which open in the cell membranes during a nerve impulse, do not work independently of each other, as assumed so far, but support each other during the opening process. This new type of mechanism appears to help the cells transmit fast changing signals and suppress slow signals.

Every living cell maintains a voltage difference across its cell membrane. Nerve cells distinguish themselves from other cells in that they use this voltage difference to process and transmit messages. When a nerve cell receives an impulse, the voltage across the cell membrane is reversed. This "action potential" spreads out through the long appendages of the cell with high speed. At the end of the appendages it is transmitted to other cells. In 1952, Alan Lloyd Hodgkin and Andrew Fielding Huxley described in a mathematical model how such an action potential originates on the basis of measurements on neurons of the squid. The Hodgkin-Huxley model, for which the scientists later received the Nobel Prize, has since then served to explain the signal processes in all neurons.

According to the Hodgkin-Huxley model, an action potential is initiated when the voltage across the membrane of the nerve cell reaches to a certain threshold value. Voltage gated sodium channels react to this voltage change by opening up and triggering an avalanche-like reaction. Positively charged sodium ions
'"/>

Source:Max-Planck-Gesellschaft


Page: 1 2 3 4

Related biology news :

1. Wisconsin scientists grow critical nerve cells
2. Clam embryo study shows pollutant mixture adversely affects nerve cell development
3. Zebrafish may hold key to understanding human nerve cell development
4. New component of the brakes on nerve regeneration found
5. Cerebral navigation: How do nerve fibers know what direction to grow in?
6. Molecular messengers perform a crucial role in the ability of injured nerve cells to heal themselves
7. Diabetic nerve therapy shows striking results
8. Malfunctioning bone marrow cells sabotage nerve cells in diabetes
9. UIC researchers show protein routes messages in nerve cells
10. Researchers find molecule that inhibits regrowth of spinal nerve cells
11. Gradient guides nerve growth down spinal cord
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Why nerve cells work faster than the theory allows

(Date:7/23/2014)... a high health risk warning for Yellowknife and surrounding ... to forest fires. In the image taken by ... normal wind patterns. Fire is an obvious health ... not quite so obvious and its effects are insidious. ... (forest, brush, crop, structure, tires, waste or wood burning) ...
(Date:7/23/2014)... , , , , , ... , , , , ... prevent multiple chronic diseases and extend healthy lifespan. The idea, they argue, would be to target the... , ... , , , , , ... , , , , , , ...
(Date:7/23/2014)... TORONTO, July 23, 2014 Migratory songbirds are disappearing, ... as climate change, loss of habitat, acid rain and ... remained missing: where do these birds go once they ... be encountering along the way? , To answer this ... have created the first ever migratory connectivity map produced ...
Breaking Biology News(10 mins):Strategy proposed for preventing diseases of aging 2Strategy proposed for preventing diseases of aging 3Strategy proposed for preventing diseases of aging 4Strategy proposed for preventing diseases of aging 5York University researchers use bird 'backpacks' to put wood thrushes migration on the map 2
... This release is available in German . ... the numerous biological functions of an organism are not regulated ... mechanisms exist that contribute to determining the fate of genes. ... even be passed on to subsequent generations to a certain ...
... University engineers have taken a first step toward a ... with heat administered from the end of a catheter. ... technically possible to treat brain tumors without the side ... chemotherapy or radiation. The bioengineers designed and built ...
... N.C. In 2004, researchers at the University of ... announced a crucial discovery in the understanding of cellular ... age, the expression of a key protein, called p16INK4a, ... is a tumor suppressor protein, cancer researchers are interested ...
Cached Biology News:New piece found in the puzzle of epigenetics 2Potential for non-invasive brain tumor treatment 2Test detects molecular marker of aging in humans 2
(Date:7/23/2014)... 23, 2014 /PRNewswire-iReach/ -- Think Drinks are a neuroscience-backed ... long term. They are the first functional focus beverage ... as an alternative to the temporary fix associated with ... on July 29, 2014, with hopes to raise $50,000 ... Photo - http://photos.prnewswire.com/prnh/20140723/129697 Think ...
(Date:7/23/2014)... , July 23, 2014  AuraSense Therapeutics, ... as gene regulatory and immunotherapeutic agents, announced ... joined AuraSense Therapeutics, executive leadership team as ... Prior to joining AuraSense Therapeutics, Mr. ... Financial Officer of Cellular Dynamics International Inc., ...
(Date:7/23/2014)... 2014 Shimadzu Scientific Instruments has ... analysis system developed jointly with Ajinomoto Co. Inc. ... analyze 38 amino acids in nine minutes, drastically ... high-speed analysis utilizing a fast application-specific column and ... analytical results even under conditions with difficult samples ...
(Date:7/23/2014)... Last year, Formedix celebrated its partnership ... of data management solutions for clinical trials. The company ... electronic data capture (EDC) and clinical data management. Formedix, ... tools added TrialMaster to its Transform for EDC product ... for TrialMaster, is being released this week, in response ...
Breaking Biology Technology:truBrain Neuroscientists To Launch More Effective, Healthier Alternative To Energy Drinks On Indiegogo 2AuraSense Therapeutics Appoints Biotechnology Veteran David S. Snyder as Chief Financial Officer 2Shimadzu's New UF-Amino Station Provides High-Speed, Multi-Component Analysis of Amino Acids in Food & Beverage and Pharmaceutical Testing 2Formedix and OmniComm Systems® Partnership Strengthened with the Release of Enhanced TrialMaster® Integration for EDC Build 2Formedix and OmniComm Systems® Partnership Strengthened with the Release of Enhanced TrialMaster® Integration for EDC Build 3
... to Reveal Successful Strategies for China, India at the PharmAsia... -- SAN FRANCISCO, October 13, 2010 ... ... (typeof(lpUnit)==,undefined,) var lpUnit=,PRN,; --> ... function(data) { var s = ,; var first_result; // Results are keyed by longUrl, so we need ...
... Calif., Oct. 13 Biomerix Corporation ... Patent and Trademark Office (USPTO) has granted ... technology titled "Reticulated elastomeric matrices, their manufacture ... platform technology, the Biomerix Biomaterial™ is a ...
... RICHLAND, Washington A redesign of sodium-nickel chloride batteries ... with rechargeable batteries. Replacing their typical cylindrical shape with ... 30 percent more power at lower temperatures, according to ... October 8 issue of ECS Transactions , a ...
Cached Biology Technology:Biopharma Leaders to Reveal Successful Strategies for China, India at the PharmAsia Summit in San Francisco 2Biopharma Leaders to Reveal Successful Strategies for China, India at the PharmAsia Summit in San Francisco 3Biopharma Leaders to Reveal Successful Strategies for China, India at the PharmAsia Summit in San Francisco 4Biopharma Leaders to Reveal Successful Strategies for China, India at the PharmAsia Summit in San Francisco 5Biopharma Leaders to Reveal Successful Strategies for China, India at the PharmAsia Summit in San Francisco 6Biopharma Leaders to Reveal Successful Strategies for China, India at the PharmAsia Summit in San Francisco 7Biopharma Leaders to Reveal Successful Strategies for China, India at the PharmAsia Summit in San Francisco 8Biopharma Leaders to Reveal Successful Strategies for China, India at the PharmAsia Summit in San Francisco 9Biomerix Granted US Patent for Its Proprietary Biomaterial Platform Technology 2Planar power 2
Anti 7H6 Antigen (tight-junction associated protein Antigen) Monoclonal Antibody 7H6...
... to ARG. Vasopressin The antibody ... Cells are found in the paraventricular ... found throughout the hypothalmus in rat ... Immunogen: Arginine ...
Rabbit polyclonal to LCAT ( Abpromise for all tested applications). entrezGeneID: 3931 SwissProtID: P04180...
Mouse monoclonal [7E10] to C Peptide ( Abpromise for all tested applications). entrezGeneID: 3630 SwissProtID: P01308...
Biology Products: