Related visual stimuli inhibit auditory processing:evidence from event-related potentials
LIU Jiahao
LIANG Maojin
ZHANG Xueyuan
CAI Yuexin
CHEN Ling
ZHENG Yiqing
YANG Haidi
CHEN Suijun
ZHANG Zhigang
LI Xiaolan
HUANG Yinli
Abstract：Objective This study is to investigate the interaction in visual and auditory cortical process-ing, through audiovisual stimulus ERP combined with topomapping and source analysis. Methods Nineteen normal young volunteers were recruited, aged from 22-30 years. All the subjects undertook audiovisual (vow-el [a] vs. vowel [i]), as well as visual and auditory ERP tests. ERP waves under different stimuli were com-pared. Results Audiovisual stimuli evoked visual N1 and N2, and also a positive wave at about 600 ms. Visu-al stimulus evoked ERPs were consistent with the visual part of responses to auditory visual stimuli. Howev-er, P1 amplitude evoked by audiovisual stimuli was lower than that evoked by auditory stimuli alone (p=0.04), and topomapping showed that its distribution was close to the visual cortex. Conclusions Related visu-al stimuli appear to inhibit auditory responses, and cause the auditory response active areas to shift toward the visual response area. The results suggest that in the process of hearing rehabilitation training, avoiding visual stimuli (lip reading) may improve outcomes, although further research is very much needed.
Keywords：audiovisual combined stimulusevent related potentialcortical plasticity
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 53-56 )