Modulation of audiovisual integration in the left and right sides: effects of side and spatial coherency.

IF 2.4 4区医学 Q3 NEUROSCIENCES

BMC Neuroscience Pub Date : 2024-08-27 DOI:10.1186/s12868-024-00889-6

XiaoHui Wen, GuoQiang Li, XuHong Wang, XiaoLan Hu, HongJun Yang

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引用次数: 0

Abstract

Background: Using event-related potentials (ERPs), we aimed to investigate audiovisual integration neural mechanisms during a letter identification task in the left and right sides. Unimodal (A,V) and bimodal (AV) stimuli were presented on either side, with ERPs from unimodal (A,V) stimuli on the same side being compared to those from simultaneous bimodal stimuli (AV). Non-zero results of the AV-(A + V) difference waveforms indicated audiovisual integration on the left/right side.

Results: When spatially coherent AV stimuli were presented on the right side, two significant ERP components in the integrated differential wave were noted. The N134 and N262, present in the first 300 ms of the AV-(A + V) integration difference wave, indicated significant audiovisual integration effects. However, when these stimuli were presented on the left side, there were no significant integration components. This audiovisual integration difference may stem from left/right asymmetry of cerebral hemisphere language processing.

Conclusions: Audiovisual letter information presented on the right side was easier to integrate, process, and represent. Additionally, only one significant integrative component peaked at 140 ms in the parietal cortex for spatially non-coherent AV stimuli and provided audiovisual multisensory integration, which could be attributed to some integrative neural processes that depend on the spatial congruity of the auditory and visual stimuli.

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左右两侧视听整合的调节：侧面和空间连贯性的影响。

研究背景我们利用事件相关电位（ERPs），旨在研究字母识别任务中左右两侧的视听整合神经机制。单模态（A,V）和双模态（AV）刺激分别出现在两侧，同侧单模态（A,V）刺激产生的ERP与同时双模态刺激（AV）产生的ERP进行比较。AV-(A + V) 差异波形的非零结果显示左/右侧的视听整合：结果：当空间相干的视听刺激出现在右侧时，综合差分波中出现了两个显著的ERP成分。N134 和 N262 出现在 AV-(A + V) 整合差异波的前 300 毫秒，表明视听整合效应显著。然而，当这些刺激出现在左侧时，却没有明显的整合成分。这种视听整合差异可能源于大脑半球语言处理的左右不对称：结论：在右侧呈现的视听字母信息更容易整合、处理和表现。此外，对于空间不一致的视听刺激，只有一个重要的整合成分在顶叶皮层的 140 毫秒处达到峰值，并提供视听多感官整合，这可能归因于某些依赖于听觉和视觉刺激空间一致性的整合神经过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

BMC Neuroscience 医学-神经科学

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

16 months

期刊介绍： BMC Neuroscience is an open access, peer-reviewed journal that considers articles on all aspects of neuroscience, welcoming studies that provide insight into the molecular, cellular, developmental, genetic and genomic, systems, network, cognitive and behavioral aspects of nervous system function in both health and disease. Both experimental and theoretical studies are within scope, as are studies that describe methodological approaches to monitoring or manipulating nervous system function.