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:7/10/2014)... An international team ... step of photosynthesis in action for the first time. The ... used the world,s most powerful X-ray flashlight at the US ... molecular complex called photosystem II as it splits water into ... earth,s atmosphere. The researchers report their results in the scientific ...
(Date:7/10/2014)... the open ocean as a microbial megacity, teeming with ... of water, hundreds of types of bacteria can be ... these ocean microbes have their own daily cyclesnot unlike ... wake up, commute, work, and eat at the same ... Light-loving photoautotrophsbacteria that need solar energy to help them ...
(Date:7/10/2014)... are a big, bad sea scorpion. , One minute, ... any prey in sight. The next, thanks to a ... to trolling for weaker, soft-bodied animals you stumble upon ... giant pterygotid eurypterid, the largest arthropod that ever lived. ... journal Biology Letters , dramatically re-interprets the creature,s ...
Breaking Biology News(10 mins):Scientists watch photosynthesis in action 2Scientists watch photosynthesis in action 3New research finds ocean's most abundant organisms have clear daily cycles 2New research finds ocean's most abundant organisms have clear daily cycles 3Extinct sea scorpion gets a Yale eye exam, with surprising results 2
... Spanish . A newly identified chemical sex ... improved traps for monitoring and controlling the tree-killing beetle. That,s ... Coss and his colleagues. Coss has been searching for ... of scientists from USDA,s Agricultural Research Service (ARS), Forest Service ...
... blinking fireflies, the cellular power plants that are human mitochondria, ... common? At first glance, not a lot; but, after a ... of knowledge for those trying to patch the gaps between ... days, as part of the Experimental Biology 2011 conference in ...
... 7, 2011 Metabolism encompasses the biochemical reactions that ... complementary systems: one that breaks down nutrients to generate ... the building blocks cells need to thrive. Considering the ... that metabolic dysfunctions can lead to serious diseases. ...
Cached Biology News:Scientists exploit ash tree pest's chemical communication 2Hot topics in chemical biology and drug development at EB2011 2Hot topics in chemical biology and drug development at EB2011 3Hot topics in chemical biology and drug development at EB2011 4Hot topics in chemical biology and drug development at EB2011 5At EB2011: The role of metabolism in disease 2
(Date:7/10/2014)... Toronto, Canada (PRWEB) July 10, 2014 ... often present in very low abundance and are ... quite challenging and time-consuming. , Join presenters Dr. ... Laboratories, and Dr. John Anders, Head of Quality ... mass spectrometer-based approach that can speed detection and ...
(Date:7/10/2014)... 10, 2014 Unraveling life’s mysteries can ... The Archer Family purchased a DNA test ... ended up with a lifetime of memories, sharing, and ... family members’ DNA genuinely brought the family closer together. ... deeper into genetic history and prior to taking the ...
(Date:7/10/2014)... CA (PRWEB) July 10, 2014 Senior ... institutions and professional associations, addressed the challenges of “Reducing ... Medical Device Industries” through strategic sourcing. Describing the partnership ... with the Supply Chain Management Institute ( SCMI) ... event on June 24 at the Kroc Institute of ...
(Date:7/10/2014)... PROVO, Utah , July 10, 2014 ... genome annotation and interpretation, today announced an ... sequencing (NGS) analytics for Lineagen,s NextStep Dx ... evaluation of neurodevelopmental and neurological disorders, currently ... chromosomal microarray (CMA) testing service used by ...
Breaking Biology Technology:Novel Ms Techniques Speed Detection of Biopharmaceutical Product and Process Impurities, New Webinar Hosted by Xtalks 2Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 2Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 3Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 4Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 5Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 2Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 3Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 4
... to come from NetworkAnatomy , the Pleasanton, ... communication systems. , ,The one-size-fits-all gauntlet is ... cellular and satellite technologies, a PC-based interactive monitor, ... extreme lighting to provide its user with "out-front" ...
... , ,MARSHFIELD, WI - TV writers formulating a new ... problems locating Marshfield on a map of Wisconsin. , ,But ... zero for the burgeoning field of personalized medicine that genetic ... to be their first stop. And with all thats going ...
... is the most effective way to ensure a successful ... conducting marketing research and the costs of conducting marketing ... ,Marketing research can be expensive. Not knowing your customers ... this quagmire is to go on gut instinct or ...
Cached Biology Technology:Not Just Another Gadget - It's the Gauntlet: The Next Step in Wearable Communications 2Marshfield Clinic charges ahead in genetic research 2Marshfield Clinic charges ahead in genetic research 3Marshfield Clinic charges ahead in genetic research 4Marshfield Clinic charges ahead in genetic research 5Talking Bout My Generation: The Evolution of Online Marketing Research 2Talking Bout My Generation: The Evolution of Online Marketing Research 3
... Z-Competent E. coli Transformation Buffer Set are ... E. coli cells for simple and highly ... eliminates the requirement for heat shocking and ... be performed by adding DNA to Z-Competent ...
... Universal Amplicon Detection Assay (ADA) ... the qualitative detection and quantitation ... in vitro nucleic acid amplification. ... to be used in diagnostic ...
Propidium Iodide: {3,8-diamino-5-[3-(diethylmethylammonio)propyl]-6-phenylphenanthridinium diodide}. Antifade Solution: p-Phenylenediamine and glycerol in PBS solution. 2.5ug/mL Propidium Iodide (PI)...
Apoptosis Detection Systems and Reagents...
Biology Products: