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Tag: "firing" at biology news

First real-time view of developing neurons reveals surprises, say Stanford researchers

...y not possible. While the research showed neurons firing in a more mature way than expected, it also revealed that neurons take their time establishing the final wiring of the brain. Young neurons send out branches in all directions in the hopes that some branches will connect to other neurons and form syn...

Speak up: Louder neurons form more connections

...cells that made a protein that prevented them from firing their normal electrical signals. These cells were also engineered to produce a protein that glowed green under the appropriate light. Hua looked for green neurons in her immobilized fish to see how their branches fared compared with neighboring neur...

Confirmation of human protein interaction data by human expression data

...cells that made a protein that prevented them from firing their normal electrical signals. These cells were also engineered to produce a protein that glowed green under the appropriate light. Hua looked for green neurons in her immobilized fish to see how their branches fared compared with neighboring neur...

Neurologix announces positive results of gene therapy clinical trial in Parkinson's disease

...as slowly moved towards the STN. Once a signature firing pattern was obtained confirming that the electrode was in the STN, the fine-wire electrode was removed, leaving only the microelectrode sheath through which a hair-thin (165 micron) hollow tube was inserted. Thirty-five microliters containing 3.5, 1...

The synapse is a shotgun

... more like a shotgun than a rifle when it comes to firing the neurotransmitters involved in neuronal communi... data suggest that synapse can act like a shotgun, firing buckshot-like bursts of neurotransmitter to reach receptors arrayed beyond the known receiving sites...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

...ts radar scatterometer. This instrument works by firing a trio of high-frequency radar beams down to the ocean, then analysing the pattern of backscatter reflected up again. Wind-driven ripples on the ocean surface modify the radar backscatter, and as the energy in these ripples increases with wind veloci...

Cracking the perception code

...zed sensory neurons in the brain to fire, and that firing of these neurons, which are found in a region of t...omething is vibrating, Romo said. But the neurons' firing patterns are complex, and it's been tricky to tease out "which component of the neuronal activity wa...

A new window into structural plasticity in the adult visual cortex

...e to new experiences, for example, by changing the firing pattern and responses of neurons. But it has remained an open question whether structural changes accompany this functional plasticity. In a new study published in the open-access journal PLoS Biology, Wei-Chung Allen Lee and colleagues report the co...

Scientists crack code for motor neuron wiring

...ry includes interneurons that control motor neuron firing patterns and sensory neurons that transmit feedback information on muscle action. The research team, which was led by HHMI investigator Thomas M. Jessell, published its findings in the November 4, 2005, issue of the journal Cell. Jessell collaborate...

Study ties 'new' cell-death mechanism to developmental and degenerative brain disorders

... French family. Although both mutations affect the firing of cerebellar neurons, they impact them in different ways and apparently lead to different disease manifestations. The Filipino family's ataxia is an adult-onset type with prominent motor coordination symptoms and cerebellar atrophy. The French fam...

Molecular mechanism may explain how fevers spark seizures

...ave a neuron open to the excitation and repetitive firing that characterizes seizures. The investigators are currently studying where the receptors go when the temperature is raised -- are they taken inside the cell more quickly, are they degraded, is their forward insertion into the cell membrane slowed? ...

Septum keeps neurons in synch, can reduce epileptic seizures by 90 percent

...ormal ranges," Colom said. "By keeping the neurons firing normally, the septum inhibits neuronal hyperexcita...the septal neurons of epileptic rats doubled their firing rates in relation to the controls, from about 14 spikes per second to about 29 spikes per second. ...

Brain-computer link lets paralyzed patients convert thoughts into actions

...l stuff, but the data that we get from the neurons firing in different patterns when you're thinking in different ways. And seeing it is only the beginning." The system is constantly being improved. Next steps include faster and more precise algorithms to help the computer keep pace with the neuronal inpu...

In drug design, a loose fit may be best bet

...d GPCR, activating a succession of G-proteins, and firing signal after signal. A tight connection, alternatively, may tie up a hormone with its GPCR, activating one G-protein, and limiting its signaling ability. In future studies, the scientists hope to determine whether their findings are consistent with ...

Tastes great! Study shows brain's response to pleasing -- and changing -- tastes

...ant brain region for both pleasure and craving. If firing patterns go wrong in ventral pallidum, it could possibly contribute to eating disorders, anorexia and drug addiction. Eventually, activation in the ventral pallidum in response to pleasurable tastes could also be useful in brain-mapping techniques...

New mechanism explains glucose effect on wakefulness

...hey wrote, "Because the sensitivity of orexin cell firing to the small changes in extracellular glucose that...leagues. "These results provide evidence that the firing rate of orexin cells is sensitive to changes in glucose that correspond to fluctuations occurring no...

Slow brain waves play key role in coordinating complex activity

...panying dream sleep - are generated by coordinated firing of neurons in the brain triggered by waves of exci...rating groups: low-frequency waves synchronize the firing of large groups of neurons, while the higher frequencies synchronize smaller groups. Though neurosci...

Archerfish tune their shots to universal properties of prey adhesion

...for insects and other small terrestrial animals by firing precisely aimed streams of water that knock prey onto the water's surface. These water shots were once thought to be all-or-none in quality, but researchers have now discovered new levels of sophistication in the archerfish's hunting strategy that sh...

Gene therapy inhibits epilepsy in animals

... activated, they inhibit the repetitive, excessive firing of brain cells that characterizes a seizure. Seizures are thought to occur, at least in part, because of an imbalance between two types of neurotransmitters: the glutamate system, which stimulates neurons to fire, and the GABA system, which inhibits ...

Thinking with the spinal cord?

...y underlying movements, show the similar irregular firing patterns as seen in the cerebral cortex. New approach "Our findings contradict conventional wisdom about spinal cord functions," says Rune W. Berg from Department of Neuroscience and Pharmacology at the Faculty of Health Sciences. Until n...

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