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Experimental Brain Research

, Volume 154, Issue 2, pp 238–245 | Cite as

Visual enhancement of touch in spatial body representation

  • Clare Press
  • Marisa Taylor-Clarke
  • Steffan Kennett
  • Patrick Haggard
Research Article

Abstract

Perception of our own bodies is based on integration of visual and tactile inputs, notably by neurons in the brain's parietal lobes. Here we report a behavioural consequence of this integration process. Simply viewing the arm can speed up reactions to an invisible tactile stimulus on the arm. We observed this visual enhancement effect only when a tactile task required spatial computation within a topographic map of the body surface and the judgements made were close to the limits of performance. This effect of viewing the body surface was absent or reversed in tasks that either did not require a spatial computation or in which judgements were well above performance limits. We consider possible mechanisms by which vision may influence tactile processing.

Keywords

Somatosensory cortex Cross-modal Somatotopic Touch Body representation 

Notes

Acknowledgements

This work was supported by grants from the Medical Research Council (UK), the Wellcome Trust and the Leverhulme Trust. We thank John Christie for advice.

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Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • Clare Press
    • 1
  • Marisa Taylor-Clarke
    • 1
  • Steffan Kennett
    • 1
  • Patrick Haggard
    • 1
  1. 1.Institute of Cognitive Neuroscience and Department of PsychologyUCL (University College London)LondonUK

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