Gate control theory, proposed by Melzack and Wall, is relevant to biofeedback for pain because it explains how:
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A
All pain signals travel unimpeded to the cortex without modulation
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B
Non-nociceptive input and descending control can modulate pain signal transmission in the spinal cord
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C
Biofeedback eliminates nociceptors at the injury site
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D
Pain is exclusively a psychological construct with no peripheral component