Tactile perception recruits functionally related visual areas in the late-blind

Manu S. Goyal, Peter J. Hansen, Colin B. Blakemore

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

When blind people touch Braille characters, blood flow increases in visual areas, leading to speculation that visual circuitry assists tactile discrimination in the blind. We tested this hypothesis in a functional magnetic resonance imaging study designed to reveal activation appropriate to the nature of tactile stimulation. In late-blind individuals, hMT/V5 and fusiform face area activated during visual imagery of moving patterns or faces. When they touched a doll's face, right fusiform face area was again activated. Equally, hMT/V5 was activated when objects moved over the skin. We saw no difference in hMT/V5 or fusiform face area activity during motion or face perception in the congenitally blind. We conclude that specialized visual areas, once established through visual experience, assist equivalent tactile identification tasks years after the onset of blindness.

Original languageEnglish
Pages (from-to)1381-1384
Number of pages4
JournalNeuroReport
Volume17
Issue number13
DOIs
StatePublished - Sep 1 2006

Keywords

  • Blindness
  • Functional magnetic resonance imaging
  • Fusiform face area
  • Human area MT/V5
  • Imagery
  • Plasticity
  • hMT/V5

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