An airbag for perceiving pain: Basic mechanisms governing the perception of pain discovered - Eureka! Science News

Everyone knows how it feels to bite into a hot chili pepper or burn the roof of one?s mouth with a hot drink. This activates nerve cells that relay the potential threat to the brain, which then causes the person in question to perceive pain.

Source: http://esciencenews.com/sources/science.daily/2012/04/05/an.airbag.perceiving.pain.basic.mechanisms.governing.perception.pain.discovered

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