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If you step on a tack, neurons in your brain will register two things: that there's a piercing physical sensation in your foot, and that it's not pleasant. Now, a team of scientists has identified a bundle of brain cells in mice responsible for the latter -- that is, the negative emotions of pain.
Original Article: Brain cells that make pain unpleasantNEXT ARTICLE
Pain is a feeling (sharp or dull) triggered in the nervous system which can be transient or constant. Pain can be specific to one area of the body eg back, abdomen or chest or more general all over the body eg muscles ache from the flu. Without pain ...