Co-stimulation-removed audiovisual semantic integration and modulation of attention: An event-related potential study

Publication date: Available online 12 February 2020Source: International Journal of PsychophysiologyAuthor(s): Yang Xi, Qi Li, Ning Gao, Guangjian Li, Weihong Lin, Jinglong WuAbstractThe integration of multisensory objects containing semantic information involves processing of both low-level co-stimulation and high-order semantic integration. To investigate audiovisual semantic integration, we utilized bimodal stimuli (AV, simultaneous presentation of an auditory sound and a visual picture; An, simultaneous presentation of an auditory sound and a visual noise; Vn, simultaneous presentation of a visual picture and an auditory noise; Fn, simultaneous presentation of an auditory noise and a visual noise) to remove the effect of co-stimulation integration and extract data regarding high-order semantic integration. Electroencephalography with a high temporal resolution was used to examine the neural mechanisms associated with co-stimulation-removed audiovisual semantic integration in attended and unattended conditions. By comparing the (AV + Fn) and (An+Vn), we identified three effects related to co-stimulation-removed audiovisual semantic integration. In the attended condition, two semantic integration effects over bilateral occipito-temporal regions at 220–240 ms and over frontal region at 560–600 ms were observed. In the unattended condition, only one semantic integration effect over centro-frontal region at 340–360 ms was observed. These effects reflected the s...

Source: International Journal of Psychophysiology - February 14, 2020 Category: Psychiatry & Psychology Source Type: research