Shape conveyed by visual-to-auditory sensory substitution activates the lateral occipital complex

Nat Neurosci. 2007 Jun;10(6):687-9. doi: 10.1038/nn1912. Epub 2007 May 21.

Abstract

The lateral-occipital tactile-visual area (LOtv) is activated when objects are recognized by vision or touch. We report here that the LOtv is also activated in sighted and blind humans who recognize objects by extracting shape information from visual-to-auditory sensory substitution soundscapes. Recognizing objects by their typical sounds or learning to associate specific soundscapes with specific objects do not activate this region. This suggests that LOtv is driven by the presence of shape information.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acoustic Stimulation / methods
  • Adolescent
  • Adult
  • Auditory Perception / physiology*
  • Blindness / physiopathology
  • Brain Mapping
  • Discrimination, Psychological / physiology
  • Female
  • Humans
  • Image Processing, Computer-Assisted
  • Magnetic Resonance Imaging
  • Male
  • Occipital Lobe / physiology*
  • Oxygen / blood
  • Recognition, Psychology / physiology*
  • Stereognosis / physiology*
  • Touch / physiology*

Substances

  • Oxygen