BRAMS Laboratory, Université de Montréal, Montréal, Canada; UNESCOG, Université Libre de Bruxelles, U.L.B., Belgium.
Clin Neurophysiol. 2010 Apr;121(4):533-41. doi: 10.1016/j.clinph.2009.12.018. Epub 2010 Jan 13.
Several studies have explored the processing specificity of music and speech, but only a few have addressed the processing autonomy of their fundamental components: pitch and phonemes. Here, we examined the additivity of the mismatch negativity (MMN) indexing the early interactions between vowels and pitch when sung.
Event-related potentials (ERPs) were recorded while participants heard frequent sung vowels and rare stimuli deviating in pitch only, in vowel only, or in both pitch and vowel. The task was to watch a silent movie while ignoring the sounds.
All three types of deviants elicited both an MMN and a P3a ERP component. The observed MMNs were of similar amplitude for the three types of deviants and the P3a was larger for double deviants. The MMNs to deviance in vowel and deviance in pitch were not additive.
The underadditivity of the MMN responses suggests that vowel and pitch differences are processed by interacting neural networks.
The results indicate that vowel and pitch are processed as integrated units, even at a pre-attentive level. Music-processing specificity thus rests on more complex dimensions of music and speech.
已有多项研究探讨了音乐和言语的加工特异性，但仅有少数研究探讨了它们的基本成分——音高和音素的加工自主性。在此，我们考察了当元音以歌唱形式呈现时，其与音高之间早期相互作用的失匹配负波（MMN）指数的加和性。
参与者在观看无声电影的同时忽略声音，记录他们的事件相关电位（ERP）。当他们听到频繁出现的歌唱元音和仅在音高、仅在元音或音高和元音上都有偏差的稀有刺激时，会产生 ERP。
所有三种类型的偏差都引发了 MMN 和 P3a 成分。三种偏差的 MMN 幅度相似，双偏差的 P3a 更大。元音和音高偏差的 MMN 没有加和性。
MMN 反应的下加和性表明，元音和音高差异是通过相互作用的神经网络进行处理的。
结果表明，即使在非注意水平，元音和音高也被视为整合的单元。因此，音乐加工特异性取决于音乐和言语更复杂的维度。
