Department of Life Sciences, The University of Tokyo, Tokyo, Japan.
Sci Rep. 2021 Jan 12;11(1):591. doi: 10.1038/s41598-020-80095-6.
We have a keen sensitivity when it comes to the perception of our own voices. We can detect not only the differences between ourselves and others, but also slight modifications of our own voices. Here, we examined the neural correlates underlying such sensitive perception of one's own voice. In the experiments, we modified the subjects' own voices by using five types of filters. The subjects rated the similarity of the presented voices to their own. We compared BOLD (Blood Oxygen Level Dependent) signals between the voices that subjects rated as least similar to their own voice and those they rated as most similar. The contrast revealed that the bilateral superior temporal gyrus exhibited greater activities while listening to the voice least similar to their own voice and lesser activation while listening to the voice most similar to their own. Our results suggest that the superior temporal gyrus is involved in neural sharpening for the own-voice. The lesser degree of activations observed by the voices that were similar to the own-voice indicates that these areas not only respond to the differences between self and others, but also respond to the finer details of own-voices.
当涉及到对自己声音的感知时，我们有敏锐的敏感性。我们不仅可以检测到自己和他人之间的差异，还可以检测到自己声音的细微变化。在这里，我们研究了这种对自己声音敏感感知的神经相关性。在实验中，我们使用五种类型的滤波器来修改受试者自己的声音。受试者对呈现的声音与自己声音的相似性进行评分。我们比较了被受试者评为与自己的声音最不相似的声音和被评为与自己的声音最相似的声音之间的 BOLD（血氧水平依赖）信号。对比结果表明，双侧颞上回在听与自己的声音最不相似的声音时表现出更大的活动，而在听与自己的声音最相似的声音时表现出较小的活动。我们的研究结果表明，颞上回参与了对自身声音的神经增强。与自身声音相似的声音的激活程度较低，这表明这些区域不仅对自我和他人之间的差异有反应，而且对自身声音的更细微差别也有反应。
