Auditory MEG mismatch responses modified by visual stimulation accompanying auditory stimulation
Auditory MEG mismatch responses modified by visual stimulation accompanying auditory stimulation
复制标题
伴随听觉刺激的视觉刺激改变听觉脑电图失配反应
DOI：
10.1007/s11062-012-9294-9
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发表时间：
2012
期刊：
影响因子：
0.5
通讯作者：
Jomori I.
中科院分区：
文献类型：
--
作者：
Nakagawa Y;Hoshiyama M;Uemura J;Jomori I.
我们使用脑磁图(MEG)系统研究了视觉刺激对听觉失配反应的影响。在静态视觉刺激(A-0)、听觉 + 同步视觉刺激(AV-S)和听觉 + 非同步视觉刺激(AV-R)三种视听条件下，记录了10名健康受试者的失配磁场。8名受试者获得了清晰的MMNms。均方根值(R.M.S.)与右侧大脑半球其他条件下记录的结果相比，在AV-S条件下记录的脑电值和整体场强更大(P= 0.0087，方差分析)。标准刺激和异常刺激诱发的N1MS潜伏期差值在AV-S条件下显著小于其他条件下(P= 0.016)。在不同条件下，MMNm的偶极定位没有差异。结果表明，同时视觉刺激提高了听觉MMNm。失配反应不仅可以由偏离刺激的物理量确定，还可以由由于不同通道的伴随刺激而产生的偏离特征来确定。
We investigated the effects of visual stimulation on auditory mismatch responses using a magnetoencephalography (MEG) system. Mismatch magnetic fields (MMNms, equivalents of EEG mismatch negativity, MMN) were recorded in 10 healthy subjects under three audio-visual conditions, which consisted of auditory stimulation with a static visual stimulation (A-0), auditory + synchronous visual stimulation (AV-S), and auditory + asynchronous visual stimulation (AV-R). Clear MMNms were obtained from eight subjects. The amplitude of the root mean square (r.m.s.) value, as well as the global field power, under AV-S conditions were greater compared to those recorded under other conditions in the right hemisphere (P= 0.0087, ANOVA). The latency difference of the N1ms, equivalents of the N1 ERP component recorded in the right hemisphere 100 msec after stimulation and elicited by standard and deviant stimuli, was significantly smaller under AV-S conditions than under other conditions (P= 0.016). There was no difference in the dipole localization for MMNm among the conditions. The results indicate that simultaneous visual stimulation enhances auditory MMNm. The mismatch response can be determined not only by the physical amount of deviated stimulation but also by a deviated feature produced due to accompanying stimulation of a different modality.