Varying Thermal Grill Illusion Experiment Sheds More Light on Pain

The thermal grill produces burning heat sensations because of a three-way interaction between the nerve pathways that tell the brain about warmth, cold and pain.

Next time you hit your finger with a ill-judged strike of the hammer, cross your fingers, scientists suggest. A study has found that crossing the fingers can confuse the way the brain processes feelings of hot, cold and pain – in some cases reducing painful sensations.

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