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Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
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12 years ago
"No brain, no pain" is a cute phrase, but is it true that a brain is required to feel pain? Explain. Brain surgery can be performed on awake patients with anesthesia only to the overlying tissues (i.e. brain, no pain). Does this fact indicate that "no brain, no pain" is just a rhyme with no scientific basis? Explain.
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12 years ago
It is true that a brain is required to feel pain. Pain is a perception triggered by potentially damaging stimuli to peripheral receptors. Just as we are deaf or blind if auditory or visual brain areas do not function (or are not present), we feel no pain without brain processing of noxious stimuli. Cutting into the brain without anesthetizing it is possible because the brain lacks the receptors that respond to noxious stimuli, thus there are no painful inputs for the brain to process.
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