Neural Substrates of Perceptual Enhancement by Cross-Modal Spatial Attention
Journal of Cognitive Neuroscience
Deactivation of Sensory-Specific Cortex by Cross-Modal Stimuli
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Enhancement of perceived visual intensity by auditory stimuli: A psychophysical analysis
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Visuo-tactile integration in personal space
Journal of Cognitive Neuroscience
Multimodal display integration for in-vehicle assistive technology (IVAT)
ACM SIGACCESS Accessibility and Computing
Neuromodulation of early multisensory interactions in the visual cortex
Journal of Cognitive Neuroscience
Stroke rehabilitation with a sensing surface
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Multimedia Tools and Applications
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Spatial constraints on multisensory integration of auditory (A) and visual (V) stimuli were investigated in humans using behavioral and electrophysiological measures. The aim was to find out whether cross-modal interactions between A and V stimuli depend on their spatial congruity, as has been found for multisensory neurons in animal studies (Stein & Meredith, 1993). Randomized sequences of unimodal (A or V) and simultaneous bimodal (AV) stimuli were presented to right- or left-field locations while subjects made speeded responses to infrequent targets of greater intensity that occurred in either or both modalities. Behavioral responses to the bimodal stimuli were faster and more accurate than to the unimodal stimuli for both same-location and different-location AV pairings. The neural basis of this cross-modal facilitation was studied by comparing event-related potentials (ERPs) to the bimodal AV stimuli with the summed ERPs to the unimodal A and V stimuli. These comparisons revealed neural interactions localized to the ventral occipito-temporal cortex (at 190 msec) and to the superior temporal cortical areas (at 260 msec) for both same- and different-location AV pairings. In contrast, ERP interactions that differed according to spatial congruity included a phase and amplitude modulation of visual-evoked activity localized to the ventral occipito-temporal cortex at 100–400 msec and an amplitude modulation of activity localized to the superior temporal region at 260–280 msec. These results demonstrate overlapping but distinctive patterns of multisensory integration for spatially congruent and incongruent AV stimuli.