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10 Cards in this Set

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