Why is it that rubbing the site of an injury can make it feel like the pain caused by that injury is being reduced?
A) Because vigorous rubbing of an injury site can help to close the "pain gates" in the spinal cord.
Incorrect. This is not precisely how the gate-control theory of pain reduction works.
B) Because touch messages travel faster than pain messages, and so rubbing the injury will overload the brain with touch messages that are not pain-oriented.
C) Because vigorous rubbing of an injury site leads to a greater release of endorphins.
D) Because the "nocebo" effect is activated.
Answer: B
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