PSY_3_1_28_2010 - 8 - Melzac& Wall 1965 Two types of...

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stimulates inhibitory interneurons to block nocicpetive signals that enter the spinal cord. Inhibit transmission of the pain signal • Spinal injuries can damage descending pain-control tracts and result in increased sensitivity to pain -Stress can help inhibit pain. Acupuncture also. Also placebos. Pain control: Gate theory (
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Unformatted text preview: Melzac & Wall, 1965 ) Two types of nociceptive nerve fibers terminate in the dorsal spinal cord: AXONS: • A delta : fast, relatively thick myelinated fibers: fast • C: small, unmyelinated fibers: slow Other Large-diameter A and B fibers do not transmit pain stimuli. Faster than both Adelta and C....
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