Institute for Biomagnetism and Biosignalanalysis, University of Münster, Münster, Germany.
PLoS One. 2012;7(1):e30171. doi: 10.1371/journal.pone.0030171. Epub 2012 Jan 18.
Using magnetoencephalography (MEG), we investigated the influence of long term musical training on the processing of partly imagined tone patterns (imagery condition) compared to the same perceived patterns (perceptual condition). The magnetic counterpart of the mismatch negativity (MMNm) was recorded and compared between musicians and non-musicians in order to assess the effect of musical training on the detection of deviants to tone patterns. The results indicated a clear MMNm in the perceptual condition as well as in a simple pitch oddball (control) condition in both groups. However, there was no significant mismatch response in either group in the imagery condition despite above chance behavioral performance in the task of detecting deviant tones. The latency and the laterality of the MMNm in the perceptual condition differed significantly between groups, with an earlier MMNm in musicians, especially in the left hemisphere. In contrast the MMNm amplitudes did not differ significantly between groups. The behavioral results revealed a clear effect of long-term musical training in both experimental conditions. The obtained results represent new evidence that the processing of tone patterns is faster and more strongly lateralized in musically trained subjects, which is consistent with other findings in different paradigms of enhanced auditory neural system functioning due to long-term musical training.
使用脑磁图（MEG），我们研究了长期音乐训练对部分想象音型（想象条件）处理的影响，与相同感知音型（感知条件）进行比较。记录了失匹配负波（MMNm）的磁对应物，并在音乐家和非音乐家之间进行了比较，以评估音乐训练对音型偏差检测的影响。结果表明，两组在感知条件以及简单音高音（控制）条件下均存在明显的 MMNm。然而，尽管在检测偏差音的任务中表现出高于机会的行为表现，但在想象条件下，两组均未出现明显的失匹配反应。感知条件下 MMNm 的潜伏期和侧化在组间存在显著差异，音乐家的 MMNm 更早，尤其是在左半球。相比之下，组间 MMNm 幅度没有显著差异。行为结果表明，长期音乐训练在两种实验条件下均产生了明显的影响。所得结果代表了新的证据，表明受过音乐训练的受试者对音型的处理更快且更偏向于单侧，这与由于长期音乐训练而增强听觉神经系统功能的其他不同范式中的发现一致。
