Visual localization of sounds

Nadia Bolognini, Fabrizio Rasi, Elisabetta Làdavas

Research output: Contribution to journalArticlepeer-review

Abstract

Circumscribed hemispheric lesions in the right hemisphere have been shown to impair auditory spatial functions. Due to a strong crossmodal links that exist between vision and audition, in the present study, we have hypothesized that multisensory integration can play a specific role in recovery from spatial representational deficits. To this aim, a patient with severe auditory localization defect was asked to indicate verbally the spatial position where the sound was presented. The auditory targets were presented at different spatial locations, at 8°, 24°, 40°, 56°to either sides of the central fixation point. The task was performed either in a unimodal condition (i.e., only sounds were presented) or in crossmodal conditions (i.e., a visual stimulus was presented simultaneously to the auditory target). In the crossmodal conditions, the visual cue was presented either at the same spatial position as the sound or at 16°or 32°, nasal or temporal, of spatial disparity from the auditory target. The results showed that a visual stimulus strongly improves the patient's ability to localize the sounds, but only when it was presented in the same spatial position of the auditory target.

Original languageEnglish
Pages (from-to)1655-1661
Number of pages7
JournalNeuropsychologia
Volume43
Issue number11
DOIs
Publication statusPublished - 2005

Keywords

  • Audio-visual interaction
  • Auditory spatial deficit
  • Multisensory integration
  • Spatial attention

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Neuropsychology and Physiological Psychology

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