Navigation Links
Brain works more chaotically than previously thought

l examination of the "white matter" in the brain of rats. This substance contains the "cable ducts" linking the right and left halves of the brain. They consist essentially of axons and ancillary cells. There are no dendrites or even synapses here. "So it is not a place where we would expect to see the release of messengers," the neuroscientist explains.

Yet it is in the white matter that the scientists have made a remarkable discovery. As soon as an electrical impulse runs through an axon cable, tiny bubbles containing glutamate travel to the axon membrane and release their content into the brain. Glutamate is one of the most important neurotransmitters, being released when signal transmission occurs at synapses. The researchers were able to demonstrate that certain cells in the white matter react to glutamate: the precursor to what are known as oligodendrocytes. Oligodendrocytes are the brain's "insulating cells". They produce the myelin, a sort of fatty layer that surrounds the axons and ensures rapid retransmission of signals. "It is likely that insulating cells are guided by the glutamate to locate axons and envelope them in a layer of myelin," says Dirk Dietrich.

As soon as the axons leave the white "cable duct" they enter the brain's grey matter where they encounter their receptor dendrites. Here, the information is passed on at the synapses to the receptor cells. "We think, however, that on their way though the grey matter the axons probably release glutamate at other points apart from the synapses," Dietrich speculates. "Nerve cells and dendrites are closely packed together here. So the axon could not only excite the actual receptor but also numerous other nerve cells."

If this hypothesis is correct, the accepted scientific understanding of the way neurons communicate, which has prevailed for over a hundred years, will have to be revised. In 1897 Sir Charles Sherrington first put forward the idea that chemical messengers are
'"/>

Source:University of Bonn


Page: 1 2 3

Related biology news :

1. Drug That Tags Decision-making Areas Of The Brain May Aid
2. NYU Study Reveals How Brains Immune System Fights Viral Encephalitis
3. Transport System Smuggles Medicines Into Brain
4. Bird Brains Show How Trial and Error May Contribute to Learning
5. VCU Researchers Identify Networks Of Genes Responding To Alcohol In The Brain
6. Wiley announces publication of Databasing the Brain
7. Scientists Propose Sweeping Changes to Naming of Bird Neurosystems to Acknowledge Their True Brainpower
8. Brain-mapping technique aids understanding of sleep, wakefulness
9. Some Brain Cells Change Channels To Fine-tune The Message
10. Brain Scans Reveal How Gene May Boost Schizophrenia Risk
11. Brain-injury rehabilitation depends on acetylcholine circuitry
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Brain works more chaotically than previously thought

(Date:12/10/2014)... Dec. 9, 2014  Valencell, a leader in performance ... a staggering demand from its licensees for highly accurate, ... is not solely coming from fitness and health sectors, ... "A wearable is only as useful as the ... the ultimate driver in long-term mass consumer adoption of ...
(Date:12/10/2014)... 2014 CIE San Diego has launched an ... connective tissue that enhances care coordination among social service ... client-level information; earned a second $1 million grant from ... seniors aging in community and; will be recognized as ... th 4-6p. CIE San Diego today ...
(Date:12/10/2014)... , December 9, 2014 ... ITN,s BCARD Platform   ... enterprise meeting scheduling solutions for business-to-business (B2B) events, ... world leader in mobile near-field communication (NFC), Bluetooth ...      (Logo: http://photos.prnewswire.com/prnh/20140612/691055) , Jifflenow ...
Breaking Biology News(10 mins):Wearable Technology Products Demand Highly Accurate Biometric Technology 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 2Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 3
... The GARBAN project, drawn up by Navarre University, will ... and hepatitis. , The School of Engineering at Navarre ... in Gipuzkoa (CEIT) have launched an advanced biochemical analysis ... diseases, accelerate their diagnosis and identify new therapeutic targets ...
... long time that only 2% -- 3% of human DNA ... -- often referred to as junk DNA -- consists of ... DNA, and then reinserted into a new spot in the ... retroelements. Retroviruses can insinuate themselves into the host's DNA in ...
... magnetic "nanoparticles" to DNA and then cut these "DNA ... self-assembling devices for future computers. , Findings are detailed ... Journal of the American Chemical Society. The paper was ... Albena Ivanisevic, an assistant professor of biomedical engineering and ...
Cached Biology News:Analysis Of Human Genome To Predict The Development Of Illnesses 2Chimp genome reveals a retroviral invasion 2Chimp genome reveals a retroviral invasion 3Purdue researchers use enzyme to clip 'DNA wires' 2Purdue researchers use enzyme to clip 'DNA wires' 3
(Date:12/22/2014)... Dec. 22, 2014  ( www.competitivehealth.com ) — Competitive ... medical bill review and advocacy service, has signed an ... WellCard Savings discount health services marketplace. 63% ... more than they expected to pay. As part of ... costs, WellCard Savings is pleased to offer medical bill ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... that they have been acquired by Roche (SIX: RO, ... privately held company that provides a big data platform ... (NGS) data for the academic and translational research markets. ... and will continue to focus on development of their ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... have an advantage in the media. A new study ... published in the journal of Israel,s National Security College, ... this arena too. , "Information warfare" plays ... sometimes more so than conventional weapons. Therefore, the information ...
... discovered a way to use an ancient life form to ... systems that may be surprisingly simple to build compared to ... tiny, single-celled marine life forms have existed for at least ... the life in the oceans, but they also have rigid ...
... Inc. (Nasdaq: ANDS ) announced today that ... Thursday, April 23, 2009, after the U.S. financial markets ... Thursday, April 23, 2009 at 5:00 p.m. Eastern Daylight ... and highlights and to provide an update on its ...
Cached Biology Technology:Information warfare in the 21st century: Ideas are sometimes stronger than bombs 2Ancient diatoms lead to new technology for solar energy 2Anadys Pharmaceuticals to Report First Quarter 2009 Financial Results 2
Request Info...
...
... potent inhibition of RNase A-type ribonucleases Product ... of nonhuman origin that binds noncovalently and ... A, B, and C). It does not ... U2, or CL3. QIAGEN RNase Inhibitor inhibits ...
Request Info...
Biology Products: