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Seeing where your hands are

Author

Listed:
  • Giuseppe di Pellegrino

    (University of Bologna)

  • Elisabetta Làdavas

    (University of Bologna)

  • Alessandro Farné

    (Ospedale I.N.R.C.A. ‘Fraticini’)

Abstract

Some patients with brain damage fail to identify a sensory stimulus presented on the opposite side to their lesion (contralesional) when a competing stimulus is presented on the same side (ipsilesional)1. This phenomenon has become known as extinction. It is commonly studied using a single sense such as sight or touch (unimodal extinction)2. We have studied a 75-year-old right-handed man (patient GS) who has severe left tactile extinction resulting from damage to the right frontotemporal cortex caused by a stroke. We found that an ipsilesional visual stimulus could induce extinction of a contralesional tactile stimulus (cross-modal extinction). We also found that the visual stimulus operates in a reference system attached to the hand, and not in egocentric coordinates (that is retinal, head or trunk-centred coordinates).

Suggested Citation

  • Giuseppe di Pellegrino & Elisabetta Làdavas & Alessandro Farné, 1997. "Seeing where your hands are," Nature, Nature, vol. 388(6644), pages 730-730, August.
    • Handle: RePEc:nat:nature:v:388:y:1997:i:6644:d:10.1038_41921
    DOI: 10.1038/41921
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    Cited by:

    1. Andrea Serino & Laura Annella & Alessio Avenanti, 2009. "Motor Properties of Peripersonal Space in Humans," PLOS ONE, Public Library of Science, vol. 4(8), pages 1-8, August.

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