FIG. 2. Responses of primate STT cells to innocuous indentation of the skin before (0) and after (0) thermal damage. Graphs plot the mean responses of nine STT cells to a graded series of indentations of the skin (1 5 to 500 tim) before and after a series of noxious heat stimuli, each lasting 120 sec and ranging up to 50'C. In A, the mechanical stimuli were applied in the same area of skin that was heated, whereas in B the mechanical stimuli were applied 1 cm away from the heated zone. C. Responses of four STT cells were the same when the mechanical stimuli were applied a second time to unheated skin. (From ref. 37.) Click here to see the graphic at a different resolution