Audio-visual integration through the parallel visual pathways
Language English Country Netherlands Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
26165152
DOI
10.1016/j.brainres.2015.06.036
PII: S0006-8993(15)00518-1
Knihovny.cz E-resources
- Keywords
- DTI, Doubleflash, MRI, Multisensory, TBSS,
- MeSH
- Acoustic Stimulation MeSH
- Anisotropy MeSH
- White Matter physiology MeSH
- Adult MeSH
- Humans MeSH
- Brain Mapping MeSH
- Auditory Perception physiology MeSH
- Photic Stimulation MeSH
- Signal Detection, Psychological physiology MeSH
- Diffusion Tensor Imaging MeSH
- Imaging, Three-Dimensional MeSH
- Visual Perception physiology MeSH
- Visual Pathways physiology MeSH
- Check Tag
- Adult MeSH
- Humans MeSH
- Male MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Audio-visual integration has been shown to be present in a wide range of different conditions, some of which are processed through the dorsal, and others through the ventral visual pathway. Whereas neuroimaging studies have revealed integration-related activity in the brain, there has been no imaging study of the possible role of segregated visual streams in audio-visual integration. We set out to determine how the different visual pathways participate in this communication. We investigated how audio-visual integration can be supported through the dorsal and ventral visual pathways during the double flash illusion. Low-contrast and chromatic isoluminant stimuli were used to drive preferably the dorsal and ventral pathways, respectively. In order to identify the anatomical substrates of the audio-visual interaction in the two conditions, the psychophysical results were correlated with the white matter integrity as measured by diffusion tensor imaging.The psychophysiological data revealed a robust double flash illusion in both conditions. A correlation between the psychophysical results and local fractional anisotropy was found in the occipito-parietal white matter in the low-contrast condition, while a similar correlation was found in the infero-temporal white matter in the chromatic isoluminant condition. Our results indicate that both of the parallel visual pathways may play a role in the audio-visual interaction.
Department of Neurology Albert Szent Györgyi Clinical Centre University of Szeged Szeged Hungary
Department of Physiology University of Szeged Szeged Hungary
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