REPRINT OF POLISH TRANSLATION OF ARTICLE BY ACCORD INTERNATIONAL ASSOCIATION FOR THE STUDY OF PAIN (IASP) - PAIN 155 (2014) 635-642 Pain relief by touch: A quantitative approach
Journal Title: BÓL - Year 2014, Vol 15, Issue 4
Abstract
Pain relief by touch has been studied for decades in pain neuroscience. Human perceptual studiesrevealed analgesic effects of segmental tactile stimulation, as compared to extrasegmental touch. However, the spatial organisation of touch-pain interactions within a single human dermatome has not been investigated yet. In 2 experiments we tested whether, how, and where within a dermatome touch modulates the perception of laserevoked pain. We measured pain perception using intensity ratings, qualitative descriptors, and signal detection measures of sensitivity and response bias. Touch concurrent with laser pulses produced a significant analgesia, and reduced the sensitivity in detecting the energy of laser stimulation, implying a functional loss of information within the ascending Aδ pathway. Touch also produced a bias to judge laser stimuli as less painful. This bias decreased linearly when the distance between the laser and tactile stimuli increased. Thus, our study provides evidence for a spatial organisation of intrasegmental touch-pain interactions.
Authors and Affiliations
Flavia Mancini, Thomas Nash, Gian Iannetti, Patrick Haggard
Keywords
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- EP ID EP69185
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