Paraskevopoulos Evangelos, Kuchenbuch Anja, Herholz Sibylle C, Foroglou Nikolaos, Bamidis Panagiotis, Pantev Christo
Institute for Biomagnetism and Biosignalanalysis, University of Münster, Germany; Laboratory of Medical Physics, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece.
Hum Brain Mapp. 2014 Nov;35(11):5389-400. doi: 10.1002/hbm.22558. Epub 2014 Jun 11.
This study investigated the cortical responses underlying magnitude comparisons of multisensory stimuli and examined the effect that musical expertise has in this process. The comparative judgments were based on a newly learned rule binding the auditory and visual stimuli within the context of magnitude comparisons: "the higher the pitch of the tone, the larger the number presented." The cortical responses were measured by simultaneous MEG\EEG recordings and a combined source analysis with individualized realistic head models was performed. Musical expertise effects were investigated by comparing musicians to non-musicians. Congruent audiovisual stimuli, corresponding to the newly learned rule, elicited activity in frontotemporal and occipital areas. In contrast, incongruent stimuli activated temporal and parietal regions. Musicians when compared with nonmusicians showed increased differences between congruent and incongruent stimuli in a prefrontal region, thereby indicating that music expertise may affect multisensory comparative judgments within a generalized representation of analog magnitude.
本研究调查了多感官刺激大小比较背后的皮层反应，并检验了音乐专业知识在此过程中的作用。比较判断基于在大小比较情境中绑定听觉和视觉刺激的新学规则：“音调越高，呈现的数字越大”。通过同步脑磁图/脑电图记录测量皮层反应，并使用个性化逼真头部模型进行联合源分析。通过比较音乐家和非音乐家来研究音乐专业知识的影响。与新学规则相对应的一致视听刺激在额颞叶和枕叶区域引发活动。相比之下，不一致的刺激激活了颞叶和顶叶区域。与非音乐家相比，音乐家在额叶前部区域中一致和不一致刺激之间的差异更大，从而表明音乐专业知识可能会在模拟量的广义表征内影响多感官比较判断。
