Ipsilateral visual and auditory spatial information interaction mechanisms in selective attention conditions: Behavioral and ERP study

We used event-related potentials (ERPs) to evaluate the neural mechanism of which auditory spatial information affect audiovisual integration in visual attention task. Some previous studies showed that the ERPs components elicited by audiovisual integration existed in the nonspecific cortices as well as specific visual and auditory cortex. It was widely considered that there weren´t significant difference in ERPs of multi-sensory interaction on the left and right. In this study, we compared the integration which elicited by left and right stimuli. The significant differences were found between left and right, which were supported by the following results: (1)There are significant difference between left and right visual and auditory stimuli in early integration. There was integration effect in front area around 100-120ms when visual and auditory stimuli appeared in the right. But there was none in the left. (2)There are also siginificant differece between left and right visual and auditory stimuli in late integration. It showed difference in left and right audiovisual integration in front area and top head. Furthermore, it indicated that the processing of multi-sensory information was different between left and right brain.