Tag: "stimuli" at medical news

Transcranial Magnetic Stimulation Enhances Short-Term Brain Plasticity

...n that the braincontinually responds to changes in stimuli by reorganizing itself. Thesechanges are often be...se ofthe tourniquet, the brain?s responsiveness to stimuli increased, meaning thatits plasticity was enhanced. However, when researchers applied TMS to thenon...

MIT Touch Lab Research Explores The Hand

...s developed in the lab areused to apply controlled stimuli to the hands of human subjects in experimentsto study perception. "We want to understand the overall perceptual capabilities of the humanhand and sense of touch, as well as the underlying mechanisms," said Mandayam A.Srinivasan, director of t...

Seeing Movement In The Dark

...rsof day vision. In their experiments, two moving stimuli were presented to the observers. Thecolors of the stimuli were carefully chosen so that one stimulus was onlyvisible to the cone photoreceptors and the other ...

Neurobiologists Show How The Brain Processes Signals From Pheromones

...lend or a cocktail. "It's a collection of chemical stimuli that allows one animal to determine, forexample, that the other one is female, that it is at the right part of the cycleto mate and that it hasn't mated yet," explains Mombaerts. "All this informationis transmitted by a few chemicals in a complex ble...

Discussion about learning processes reopens

...unicating nerve cells by short intensiveelectrical stimuli and to measure this improvement as an increased response bythe neuron, which lasts for several hours. Henceforth, this test, termedlong-term potentiation (LTP) in scientific textbooks, has been used as a measurefor the capability of nerve cells to ad...

Brain region used in face recognition is active in new object recognition

... Future studies should investigate a range of stimuli - both more and lessface-like than greebles - and the type of expertise that can generate activity in face-specificbrain areas, according to the authors. Their study was supported by grants from the National ScienceFoundati...

The latest flight jacket gives pilots a real feel for flying

...e. Part of the advantage of using tactile stimuli is that the human bodyneeds no time to process touch: you instantly know where you are being touched.As Anil Raj, one of the researchers behind the jacket, says: "If someone patsyou on the shoulder there is no cognitive process involved in knowing wh...

Pain, itself, elicits pain relief, and does so through 'reward' pathway

...ch the jaw opensreflexively in response to painful stimuli to the tooth indicates the level ofpain experienced. The jaw-opening reflex decreased, a sign of analgesia, as thepainful stimulus increased. The fact that the analgesic effect was demonstrated in the teeth, far from thehindpaw, indicated its genera...

Inflammatory pain may help deter inflammatory diseases like arthritis

...oard, said Strausbaugh, though, she added, painful stimuli will likely prove tobe one of several factors modulating the inflammatory response. The researchers conducted their study in anesthetized rats with inflamed kneejoints, determining that a painful stimulus applied to the animals' hind pawcompletely bl...

UCSF finding could lead to a new class of painkillers

...they sensitize pain-sensing neurons. As a result, stimuli that normally would not cause pain, such as the brush of a shirt being drawn onto the body, become painful when the skin is sunburned; likewise, the movement of a joint, normally unnoticed, would cause pain in the presence of arthritis. Chemical sig...

Novel neural net recognizes spoken words better than human listeners

...gh a trainingregimen in which desired responses to stimuli are reinforced and unwanted onesare not. "Though mathematical theorists demonstrated that nets should be highly effectivefor certain kinds of computation (particularly pattern recognition), it has beendifficult for artificial neural networks even to ...

Strain makes for stronger engineered tissues

...hatengineered smooth muscle responds to mechanical stimuli as well. But the U-Mresearch provides a clearer understanding of exactly how mechanical stimulationleads to increased strength. "The major contribution of this paper is that it demonstrates an interactionbetween the chemistry and the mechanics," Moo...

Yale scientists discover new technique for studying living cells, furthering knowledge of diseases like Parkinson's

...rime the neuron to respond more effectively to new stimuli during this time. JoAnn Buchanan, M.D., of the department of molecular and cell physiology at Stanford University, used electron microscopy to verify that the recordings were on mitochondria....

MCG researchers find clues in process that enables working memory

...discovered that explains how cells might integrate stimuli to come up with a different response. Before this, we had a less interactive view of how cells respond to multiple stimuli," Dr. Bergson said. "Now we have learned something very specific about how dopamine D1 receptors probably work in the brain." ...

Hypnosis reduces surgical pain and time, improves safety

...ullness, numbness, coolness or warmth when painful stimuli are imminent. The hypnotic techniques require proper training, Lang says. In the study, a nurse, two medical students, a psychology graduate student and a physician all were trained to administer the hypnotic interventions. The study was conducted at...

Parenting, stress and your child's risk for alcoholism

... more fearful, they were much more reactive to the stimuli around them, and they did not have an adult around to calm them down. So what you have is a monkey who is chronically anxious and chronically fearful." Adult absence during infancy appears to have had other long-term psychobiological consequences, n...

Animal model shows pain and tissue injury in newborns alters nerve circuitry and reaction to pain later in life

...tudy adds pain to the emerging list of early birth stimuli that we are discovering have a lifelong impact and suggests that further study is warranted to develop approaches to limit or prevent those effects," added Dr. Ruda....

American Thoracic Society Journal news tips for February (first issue)

...llergic asthma than does the currently used direct stimuli testsmethacholine and histamine. Stephen T. Holgate, M.D., of Southampton General Hospital, Southampton, United Kingdom, comments that a study by Gea de Meer, M.D., in the currentAmerican Journal of Respiratory and Critical Care Medicine shows that a...

Study suggests insulin may have potential to prevent thrombosis leading to heart attack and stroke

... (PAI-1).The gene responds rapidly to a variety of stimuli related to tissue oxygen deprivation and physical damage to blood vessels, Dandona said, and appears to play an important role in the development of human and mouse atherosclerosis. The protein TF leads, via a complex cascade of actions, to the forma...

Devices that emit sounds to track medical status or pinpoint military targets may cause mistakes

...es in pitch and loudness, depending on how the two stimuli changed in relation to each other. For example, w...on. In short, listeners couldnt perceive changing stimuli accurately, because the presence of other changing stimuli distorted their perception. Neuhoff et a...

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