Word: sensationism
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Chambers wasn't the first person to take the route from modeling and acting to hard-core, from commercials to pervertials. Eric Edwards, whose porn career spanned nearly four decades, had appeared in ads for Gillette razors and Close-Up toothpaste. But of all the shadow stars that emerged from...
But a study published today in the journal Nature Neuroscience offers some hope of lasting relief. A group of neuroscientists led by Glenn Giesler at the University of Minnesota, Minneapolis, hypothesized that the mechanism by which scratching relieves an itch takes place not along the nerve fibers of itchy skin...
In the Minnesota study, researchers sedated macaque monkeys and placed recording electrodes in their spinal nerves. They injected histamine into the monkeys' lower legs to produce an itch, and the STT neurons fired up. The researchers then scratched the paralyzed, itchy legs with a metal device that mimics the sensation...
When the team scratched the leg without first creating an artificial itch, the STT neurons fired - the normal STT-neuron response - but scratching did nothing to calm them. That demonstrates that STT nerves react differently to the sensation of a scratch when it happens in response to an existing itch...
Giesler theorizes that the itch sensation creates an excited state in the STT neurons that scratching inhibits - as if our fingernails were sending a message to spinal-cord neurons to cool off. Scientists are still a long way from understanding the itch-scratch phenomenon, and while Giesler's study gives...