Tag: "stimuli" at biology news
Hopkins, Israeli Scientists Link Soybeans With Pain Relief
...ouch and temperature such that these normally mild stimuli
cause pain. Using anesthetized rats in which the sciatic nerve to one foot is partlysevered surgically, the Israeli researchers measured sensitivity to pain bytouching the foot with fine probes of varied size. But when Shir tried to ...
Study Suggests Maternal Stress And Stress Hormones May Influence Fetal Brain Development In Utero
...fetal heart rate responses to a series of external stimuli
using an instrumentthat produces both sound and vi...cs of the challenge protocol, such as thenumber of stimuli
and time interval between successive stimuli, were associatedwith the overall pattern of fetal respo...
Abgenix Reports Encouraging Preclinical Results With ABX-EGF In Cancer Research
... is significantly increased, whichincreases growth stimuli
and causes cells to divide abnormally. Consequently,many cancer cells require EGFr for their survival. ABX-EGF binds with highaffinity to the EGFr and selectively targets these cancer cells by blocking thebinding of important tumor growth factors t...
University Of Pittsburgh Involved In First Successful Example Of Gene Therapy For Pain Control
...ry neurons, including those that respondto noxious stimuli
such as heat. "These results are quite exciting, b...id Dr. Wilson. "Only when sensitivities to noxious stimuli
are enhanced, a phenomenon that maybe important in chronic pain states, does the gene therapy act, w...
Scientists Discover Protein In Mammals Tuned To Respond To What May Be Hottest Temperature Our Nerves Can Detect
... receptorfor extreme temperatures or other noxious stimuli
broadens the range of targetsfor which you can develop candidate drugs." With the knowledge they have gained of the receptor's gene sequence, thescientists can start to study its function, a major boost to the effort todevelop new drugs against pain....
Researchers Find Unexpected Feature In Plankton Nervous System
...ally fast in sprinting fromdanger -- responding to stimuli
about a hundred times faster than humans. Myelin is a white fatty sheath that coats parts of the vertebrate nervoussystem, including the long axons of nerve cells. Like insulation on an electricwire, myelin protects and speeds the electrical signal,...
A sharper look at the brain
...erebral cortex responsible forsight) where optical stimuli
are processed. The non-invasive measurements arecarried out under anesthesia conditions that meet the most up-to-date standardsin human clinical medicine. The eyelids are held open artificially so theanimals can see the presented test pattern. At the...
Drug stops blinding blood vessel growth in mice
..., the treatments donothing to treat the underlying stimuli
for blood vessel growth, Campochiarosays. "As a result, the blood vessels tend to come back," he says. "Even withinitially successful treatments, many patients still end up with severe loss ofvision." The study was supported in...
Old brains can learn new tricks!
... Researchersmeasured their ability to discriminate stimuli
over half-second and four-secondintervals. Results show that young and older participants perform the memory task equallywell, but the neural systems or pathways supporting performance differed betweenyoung and old. While there was some overlap in th...
Brain compound's anti-aggression effects appear to reverse in monogamous male rodents
...pothalamus, a part of the brain whereenvironmental stimuli
are integrated with internal signals from the brain, and aresponse begins to be produced," Gammie says.. Researchers plan to see if they can suppress nitric oxide production in thevoles with a drug. If so, they'll test to see if using this drug in m...
Smells may trigger alcohol craving, and relapse, among alcoholics
like smells may induce craving for alcohol. Alcoho...hers are showing greater interest in environmental stimuli
and problems of relapse. According to the National Institute on Alcohol Abuse and Alcoholism, which ...
New treatment may relieve chronic pain, as reported in the 19 November issue of Science
...signals can either make patients hypersensitive to stimuli
that are minimally painful (such as a pinprick), o...hey can cause patients to feel pain in response to stimuli
that are not painful at all (a warm shower, for example). The group of neurons responsible for thes...
Sexual fantasies increase pain tolerance
..." Staats says. The new theory indicates that pain stimuli
yield strong negative emotional responses. Operatingon that premise, counterbalancing pain with a strong positive emotional response should decrease pain. Researchers set out to measure the effects of sexual fantasies a very strong positive emotio...
Columbia University College of Physicians and Surgeons receives $2.4 Million grant from Howard Hughes Medical Institute
...e organism physiology or the conversion of sensory stimuli
into meaningful cognition," says Dr. Hirsh. "The Hughes grant will enable Columbia to enhance its program by hiring several new outstanding young scholars." Columbia, like other academic medical institutions, is committed to helping young faculty mem...
Why muscle strength seeps away: a new cause for muscular dystrophy
... Its protein levels are regulated by a variety of stimuli
and endogenous factors. It sits like a cap on top of the largest known protein titin and shields the vulnerable end of this gigantic filamentous protein. For this reason it is also called T-cap in very recent publications. It most likely functions a...
Sea slug's shopping habits dictated by hunger, scientists report
...rnal state changes, its responses to food and pain stimuli
change, too. It is as if they make decisions based on a sliding scale of pleasure and pain. This is surprising for a simple invertebrate. Previously such behavior was thought to be exclusive to higher vertebrates." Hungry snails tempted with the b...
Nerve protein shown crucial to sensations of pain from heat, injury
... range ofmoderately unpleasant heat and mechanical stimuli
to the paw. Normal micewithdraw from these stimuli. In contrast, mice lacking theVR1 gene respondedmore slowly to the heat stimulus. Thus VR1 is critical for heat, but notmechanical pain sensitivity. Also, the mice didn't hesitate to drink waterspike...
University of Florida scientist maps brain reactions to food
...in's activity in response to internal and external stimuli
such as eating or drinking. Ten minutes after the scanning began, participants were given a water solution containing 75 grams of dextrose, a type of sugar, administered through an oral tube. Blood samples were obtained simultaneously for testing...
Californian wins neuroscience prize endowed by UNC scientist
...ls (now called nociceptors) respond exclusively to stimuli
that we perceive as painful. His work has had a decisive impact on modern pain research and these cells are now targets of intensive efforts to find drugs that block their function. "Although Ed showed that a class of sensory neurons respond exclusiv...
Suspect list shortens for maternal aggression's brain origins
...the hypothalamus, a brain area where environmental stimuli
are integrated with internal signals from the brain, and a response to the stimuli
begins to be produced. "We're not there yet, but the pieces of the puzzle are starting to come toge...
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