Rapid Adaptation to Auditory-Visual Spatial Disparity
AUTOR(ES)
Lewald, Jörg
FONTE
Cold Spring Harbor Laboratory Press
RESUMO
The so-called ventriloquism aftereffect is a remarkable example of rapid adaptative changes in spatial localization caused by visual stimuli. After exposure to a consistent spatial disparity of auditory and visual stimuli, localization of sound sources is systematically shifted to correct for the deviation of the sound from visual positions during the previous adaptation period. In the present study, this aftereffect was induced by presenting, within 17 min, 1800 repetitive noise or pure-tone bursts in combination with synchronized, and 20° disparate flashing light spots, in total darkness. Post-adaptive sound localization, measured by a method of manual pointing, was significantly shifted 2.4° (noise), 3.1° (1 kHz tones), or 5.8° (4 kHz tones) compared with the pre-adaptation condition. There was no transfer across frequencies; that is, shifts in localization were insignificant when the frequencies used for adaptation and the post-adaptation localization test were different. It is hypothesized that these aftereffects may rely on shifts in neural representations of auditory space with respect to those of visual space, induced by intersensory spatial disparity, and may thus reflect a phenomenon of neural short-term plasticity.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=187125Documentos Relacionados
- Potencial preditivo do teste ABLA na aquisição de treinos de discriminações condicionais auditivo-visuais e teste de outras discriminações condicionais
- Spatial contrast adaptation characteristics of neurones recorded in the cat's visual cortex.
- Spatial interaction in the domain of disparity signals in human stereoscopic vision.
- Spatial vision of the achromat: spatial frequency and orientation-specific adaptation.
- Visual-spatial and verbal-spatial binding in working memory