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10 Cards in this Set
- Front
- Back
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Skin
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the largest organ. Responds to mechanical pressure, temperature, and tissue damage (injury).
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Specificity theory
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there are different receptors for each type of stimulus (game board pattern). WRONG.
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Pattern theory
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No specific receptors but a pattern of receptors that differ in their intensity response.
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Gate control theory
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part of the pattern theory. Large fiber system (R1) has a low threshold for mechanical stimulation. Small fiber system (R2) has a high threshold.
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SG cells
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Inhibitors, prevent pain from being felt.
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T cells
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make pain be felt.
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GCT: Light touch
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Large fiber system (R1) stimulates T cells and SG cells, but SG cells inhibit T cells so no pain is felt.
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GC: strong pinch
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Small fiber system (R2) stimulates T cells and inhibits SG cells, so pain is felt.
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Combat anesthesia
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The brain can tell the spinal cord to block T cells (by stimulating SG cells).
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Phantom limb
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Large fibers are destroyed but some small fibers remain when hand is amputated, so pain is felt.
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