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Tag: "fire" at biology news

'Smart' mice teach scientists about learning process, brain disorders

...in nerve-cell membranes and stimulates the cell to fire when a nerve-cell-signaling molecule, or neurotransmitter, binds to it. NR2B previously has been implicated in the early stages of learning. The new research showed that when Cdk5 is removed from the brain, the levels of NR2B significantly increas...

Treating HIV in war zones -- Public health emergencies need rapid advice from WHO

... on ART since December 2003, says: "I heard gun fire all through the night. When I had only five pills left I lost my appetite and felt desperate…but despite the uncertainty I continued to take my treatment at the correct hour… When I had only one pill left I had the courage to go out and seek some mor...

Detecting cold, feeling pain: Study reveals why menthol feels fresh

...that, in mice, the receptor triggers the nerves to fire pain signals when they are exposed to high ambient heat or the fiery properties of peppery food. (Science, April 14, 2000). The study demonstrated that capsaicin and noxious heat elicit the sensation of burning pain through activation of the same rec...

Brain's white matter -- More 'talkative' than once thought

...eds electrical impulses. Cells lacking the coating fire 20 to 90 times slower than cells coated with myelin. Myelin loss is well known to impair signaling and information processing, causing nerve cells to die and creating such neurodegenerative conditions as multiple sclerosis. Bergles speculates that...

Paper challenges 1491 Amazonian population theories

...findings are published in a paper titled "Holocene fire and occupation in Amazonia: records from two lake districts" that appears in a recent issue of Philosophical Transactions of the Royal Society of London B: Biological Sciences. Bush says this paper, and another forthcoming in the journal Frontiers i...

Fighting influenza & co. with 40,000 blood samples

...r people. The reason for this is that with age the fire power of the immune system is reduced. Why this is the case is largely unknown. An international EU project led by the University of Bonn is now starting which aims at shedding light on this. Among other things, the researchers want to get a step clo...

Soft-cell approach cuts animal tests

...inflammation, pulmonary oedema, and pneumonia; fire combustion products, including cyanide, hydrogen s...contaminants, workplace airborne contaminants, and fire combustion products", says Dr Hayes. The technique has several advantages over conventional test...

When your brain talks, your muscles don't always listen

...ike "doublets," the brief periods when the neurons fire faster, from slower periods of activity. The results showed lower firing rates among older subjects versus younger subjects--a diminished ability of the muscle fibers to "hear" and respond to the neurons' commands. "The repeated contraction of ...

How to manage forests in hurricane impact zones

...United States are adapted to disturbance from both fire and high wind," says Stanturf, project leader of t...s to meet both the short-term goals of salvage and fire prevention and the long-term goal of reforestation and ecological recovery." Stanturf and fellow ...

Anti-dandruff compound may help fight epilepsy

...s, “must open on cue to make sure nerve cells only fire for defined periods of time.? In their studies of these channels, Li and his colleagues developed a new way of testing thousands of druglike molecules to find any that could turn the potassium switch on or off. Their approach involved chemically sh...

MIT: Pulsing light silences overactive neurons

...ses often must be treated by removing neurons that fire incorrectly. The new MIT research could lead to the development of optical brain prosthetics to control neurons, eliminating the need for irreversible surgery. "In the future, controlling the activity patterns of neurons may enable very specific t...

Anticipation plays a powerful role in human memory, brain study finds

...t the mere anticipation of a fearful situation can fire up two memory-forming regions of the brain - even before the event has occurred. That means the simple act of anticipation may play a surprisingly important role in how fresh the memory of a tough experience remains. The findings of the brain-ima...

Tarantula venom and chili peppers target same pain sensor

... that this and related receptors trigger nerves to fire pain signals when exposed to Death Valley-like heat or the fiery properties of peppery food, mustard oil and other compounds. Human pain-sensing neurons also have these receptors on their surface, and some pain treatments have been developed that tar...

Firefighters face increased risk for certain cancers

... through the skin and occur both at the scene of a fire and in the firehouse, where idling diesel fire trucks produce diesel exhaust. "Firefighters work in an inherently dangerous occupation on a dail...

Mysterious 'neural noise' actually primes brain for peak performance

...esponsible for our crystal-clear thoughts, seem to fire in utterly random ways? In the November issue of Nature Neuroscience, the Rochester study shows that the brain's cortex uses seemingly chaotic, or "noisy," signals to represent the ambiguities of the real world--and that this noise dramatically enha...

Plants give up answers in the war on bacteria

... can be catastrophic to crops. One disease, called fire blight, did $40 million in destruction to Michigan apple trees in 2000 alone and all but eliminated commercial pear crops in Michigan for that year. He also sees useful human health implications. Understanding that animal pathogens, like dangerous ...

Mirrors in the mind: New studies elucidate how the brain reflects onto itself the actions of others

...aque monkeys: A particular subset of these neurons fire when, for example, a monkey picks up a banana, and...t a somewhat different set of mirror neurons would fire if a banana were poked, for example, rather than picked up. There is also evidence that mirror neuro...

Psst! Coffee drinkers: Fruit flies have something to tell you about caffeine

... caffeine because their taste-receptor cells don't fire in response to it." The discovery, which is the first ever example of a protein required for both caffeine tasting and caffeine-induced behavior, will be published Sept. 19 in Current Biology. For the study, Montell and his colleagues kept 50 frui...

Fire ant-attacking fly spreading rapidly in Texas

Parasitic flies introduced to control red imported fire ants have spread over four million acres in centra...lly from Brazil and Argentina, to control invasive fire ants without pesticides. The fly larvae develop inside the ants and kill their host. Dr. Ed LeBrun...

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

...pleasurable." But research on how these neurons fire to signal pleasure is important for more than just curiosity's sake, he adds. The ventral pallidum is an important brain region for both pleasure and craving. If firing patterns go wrong in ventral pallidum, it could possibly contribute to eating dis...

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