Quantcast

Latest Cellular neuroscience Stories

2009-04-21 14:15:02

Proteins go everywhere in the cell and do all sorts of work, but a fundamental question has eluded biologists: How do the proteins know where to go? "There's no little man sitting there, putting the protein in the right place," said Don Arnold, a molecular and computational biologist at USC College. "Proteins have to have in them encoded information that tells them where to go in the cell." In a study appearing online this week in Nature Neuroscience, Arnold and collaborators solve the...

2009-04-04 10:09:59

Ask a simple question, get a simple answer: When Abraham Lincoln was asked how long a man's legs should be, he absurdly replied, "Long enough to reach the ground." Now, by using a new microscopy technique to watch the growth of individual neurons in the microscopic roundworm Caenorhabditis elegans, Rockefeller University researchers are turning another deceptively simple question on its head. They asked, "How long should a worm's neurons be?" And the worms fired back, "Long enough to reach...

afe5d39f36b6e8245456f0ec5270d8ad1
2009-03-10 07:30:13

Using ion-selective micro-electrodes electrical signals in plants moving from leaf to leaf could be measured. The speed of the signals spreading as voltage changes over cell membranes ranged from 5 to 10 cm per minute. The scientists discovered this new kind of electrical signal transmission system by applying a novel method: Filamentary electrodes were inserted through open stomata directly into the inner leaf tissue and then placed onto the cell walls (see picture). Stomata are...

5d33d3ca5b661618430762b314c7f6731
2009-03-09 13:56:18

Study shows coreceptors work together as 'navigators' for a growing axon To a growing axon, the protein RGMa is a "Wrong Way" sign, alerting it to head in another direction. As Hata et al. demonstrate in the March 9, 2009 issue of the Journal of Cell Biology, translating that signal into cellular action requires teamwork from two receptors. During development, new synapses form when the growing axon of one neuron reaches another neuron. As an axon searches out the path to its destination, it...

6249f5f464c0aecb1f146dff5a907e7e1
2009-02-12 10:14:24

First-of-its-kind study shows how brain connections strengthen during sleep If you ever argued with your mother when she told you to get some sleep after studying for an exam instead of pulling an all-nighter, you owe her an apology, because it turns out she's right. And now, scientists are beginning to understand why. In research published this week in Neuron, Marcos Frank, PhD, Assistant Professor of Neuroscience, at the University of Pennsylvania School of Medicine, postdoctoral researcher...

62f5d58593fcd299824f28f23ecd3adc1
2008-11-18 14:58:38

Scientists say the identification of a specific molecule could be key to understanding the cause of motor neuron disease (MND) and other neurodegenerative disorders. The study of the molecule, Wnt3, raises the hope of new treatments being developed. The London-based researchers said the molecule plays a key role in establishing connections between nerve cells and the muscles they control and that these connections become progressively weaker in MND patients. Without properly-formed...

2008-10-27 15:00:27

U.S. scientists say they've found the nervous system uses a specific type of signal to produce stable retinal images despite vigorous head movements. Researchers at the Salk Institute for Biological Studies said that in most nerve cells, an electrical signal reaching the end of a cell releases molecules called neurotransmitters that travel across the synapse -- the space between nerve cells -- and may or may not trigger an electrical signal in an adjacent cell. "Most known synapses act as...

7e3c95f81474c4f38fcb0445cf59fd671
2008-08-02 11:45:00

New research has uncovered a fundamental cellular mechanism that may drive pathological drug-seeking behavior. The study, published by Cell Press in the July 31 issue of the journal Neuron, examines the brain's reward circuitry and details strikingly distinct influences of self-administered cocaine compared to natural rewards or passive cocaine injection. Dopamine (DA) neurons residing within the ventral tegmental area (VTA) of the brain are a key part of the brain's natural reward pathway...

2ae4a7c3660bbce1e0db34ffd5e8809e1
2008-06-19 12:14:11

UCLA cellular neuroscientists are providing new insights into the mechanisms that underlie long-term memory "” research with the potential to treat long-term memory disorders. "The more we know about how long-term memory is induced in the brain and how our memories are maintained in the brain, the more we are going to be able to treat long-term memory loss," said David Glanzman, UCLA professor of physiological science and neurobiology, whose new research appears June 19 in the early...

4222c6876387e0bb39b2bd8c180cefc01
2008-04-25 07:50:00

When the eye tracks a bird's flight across the sky, the visual experience is normally smooth, without interruption. But underlying this behavior is a complex coordination of neurons that has remained mysterious to scientists. Now, University of California, San Francisco (UCSF) researchers have broken ground in understanding how the brain generates this tracking motion, a finding that offers a window, they say, into how neurons orchestrate all of the body's movements.The study, reported in the...


Word of the Day
tesla
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.