Effect of aging on audiovisual integration: Comparison of high- and low-intensity conditions in a speech discrimination task

Yang, Weiping and Guo, Ao and Yao, Hanyun and Yang, Xiangfu and Li, Zimo and Li, Shengnan and Chen, Jianxin and Ren, Yanna and Yang, Jiajia and Wu, Jinglong and Zhang, Zhilin (2022) Effect of aging on audiovisual integration: Comparison of high- and low-intensity conditions in a speech discrimination task. Frontiers in Aging Neuroscience, 14. ISSN 1663-4365

[thumbnail of pubmed-zip/versions/1/package-entries/fnagi-14-1010060/fnagi-14-1010060.pdf] Text
pubmed-zip/versions/1/package-entries/fnagi-14-1010060/fnagi-14-1010060.pdf - Published Version

Download (5MB)

Abstract

Audiovisual integration is an essential process that influences speech perception in conversation. However, it is still debated whether older individuals benefit more from audiovisual integration than younger individuals. This ambiguity is likely due to stimulus features, such as stimulus intensity. The purpose of the current study was to explore the effect of aging on audiovisual integration, using event-related potentials (ERPs) at different stimulus intensities. The results showed greater audiovisual integration in older adults at 320–360 ms. Conversely, at 460–500 ms, older adults displayed attenuated audiovisual integration in the frontal, fronto-central, central, and centro-parietal regions compared to younger adults. In addition, we found older adults had greater audiovisual integration at 200–230 ms under the low-intensity condition compared to the high-intensity condition, suggesting inverse effectiveness occurred. However, inverse effectiveness was not found in younger adults. Taken together, the results suggested that there was age-related dissociation in audiovisual integration and inverse effectiveness, indicating that the neural mechanisms underlying audiovisual integration differed between older adults and younger adults.

Item Type: Article
Subjects: Science Global Plos > Medical Science
Depositing User: Unnamed user with email support@science.globalplos.com
Date Deposited: 28 Sep 2023 09:30
Last Modified: 28 Sep 2023 09:30
URI: http://ebooks.manu2sent.com/id/eprint/1413

Actions (login required)

View Item
View Item