Auditory motion processing after early blindness

Fang Jiang, G. Christopher Stecker, Ione Fine

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

Studies showing that occipital cortex responds to auditory and tactile stimuli after early blindness are often interpreted as demonstrating that early blind subjects "see" auditory and tactile stimuli. However, it is not clear whether these occipital responses directly mediate the perception of auditory/tactile stimuli, or simply modulate or augment responses within other sensory areas. We used fMRI pattern classification to categorize the perceived direction of motion for both coherent and ambiguous auditory motion stimuli. In sighted individuals, perceived motion direction was accurately categorized based on neural responses within the planum temporale (PT) and right lateral occipital cortex (LOC). Within early blind individuals, auditory motion decisions for both stimuli were successfully categorized from responses within the human middle temporal complex (hMT+), but not the PT or right LOC. These findings suggest that early blind responses within hMT+ are associated with the perception of auditory motion, and that these responses in hMT+ may usurp some of the functions of nondeprived PT. Thus, our results provide further evidence that blind individuals do indeed "see" auditory motion.

Original languageEnglish (US)
Article number4
JournalJournal of vision
Volume14
Issue number13
DOIs
StatePublished - 2014

Keywords

  • Blindness
  • Cross-modal
  • Motion
  • Visual deprivation

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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