No, no, we aren't talking about receptors for the brain's sensory 
innervation, but structures such as the thalamus that handle pain
for the entire organism.  Apples and oranges.

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Gordon Banks  N3JXP      | "Skepticism is the chastity of the intellect, and
geb@cadre.dsl.pitt.edu   |  it is shameful to surrender it too soon." 