Visually induced analgesia: seeing the body reduces pain.

Full Abstract

Given previous reports of strong interactions between vision and somatic senses, we investigated whether vision of the body modulates pain perception. Participants looked into a mirror aligned with their body midline at either the reflection of their own left hand (creating the illusion that they were looking directly at their own right hand) or the reflection of a neutral object. We induced pain using an infrared laser and recorded nociceptive laser-evoked potentials (LEPs). We also collected subjective ratings of pain intensity and unpleasantness. Vision of the body produced clear analgesic effects on both subjective ratings of pain and the N2/P2 complex of LEPs. Similar results were found during direct vision of the hand, without the mirror. Furthermore, these effects were specific to vision of one's own hand and were absent when viewing another person's hand. These results demonstrate a novel analgesic effect of non-informative vision of the body.

Author information

Author/s: Longo, Matthew R (MR); Betti, Viviana (V); Aglioti, Salvatore M (SM); Haggard, Patrick (P);

Affiliation: Institute of Cognitive Neuroscience, University College London, London WC1N 3AR, United Kingdom. m.longo(-atsign-)ucl.ac.uk.

Grants: BB/D009529/1 (Agency:Biotechnology and Biological Sciences Research Council)

Journal and publication information

Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't

Journal: The Journal of neuroscience : the official journal of the Society for Neuroscience (J Neurosci), published in United States. (Language: eng)

Reference: 2009-Sep; vol 29 (issue 39) : pp 12125-30

Dates: Created 2009/10/01; Completed 2009/10/13;

PMID: 19793970, status: MEDLINE (last retrieval date: 10/13/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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