Pain Reactivity and Kinesthetic Aftereffect

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Abstract
The previously reported relationship between reaction to suprathreshold pain and kinesthetic aftereffect was substantiated, the pain being induced by exposure of the hand to cold air. Three groups ( nt = 9) constructed to represent three levels of reported pain reactivity differed in extent of kinesthetic aftereffect as measured by displacement of post-inspection judgments from control PSE. Those of highest reported pain reactivity showed the least displacement. The groups did not differ in recovery from aftereffect or in ascending-descending trial difference, postulated in the literature as a measure of rapid satiation on the variable stimulus. An attempt was made to resolve theoretical differences by using a vector model for displacement, and this model was applied, in a general sense, to prior studies.

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