Graduate School of Medicine, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto, 606-8507, Japan.
Organization for Promoting Developmental Disorder Research, 40 Shogoin Sanno-cho, Sakyo-ku, Kyoto, 606-8392, Japan.
Sci Rep. 2019 Jul 1;9(1):9432. doi: 10.1038/s41598-019-45849-x.
Humans recognize the self in various visual domains, such as faces, names, and motions, as well as in products, such as handwritten letters. Previous studies have indicated that these various domains of self are represented differently in the brain, i.e., domain-specific self-representation. However, it remains unclear whether these differences in brain activation are due to the processing of different visual features or to differential self-processing among the domains, because the studies used different types of visual stimuli. The present study evaluated event-related potentials (ERPs) while participants were presented with their own and others' names generated by the participants themselves or someone else. Therefore, the visual stimuli included two domains of self-related information, name and motor agent, but only one type of stimulus (handwritten names). The ERP results show that the amplitudes of the P250 component (250-330 ms) in the posterior regions were smaller for self-generated handwritten names than for non-self-generated handwritten names. The results also show that the amplitudes of the P300 component (350-500 ms) were larger for the self-name than for the non-self-name. These results suggest domain-specific processing of self-related information regarding the name and agent of handwritten stimuli.
人类在各种视觉领域（如面孔、姓名和动作）以及产品（如手写字母）中识别自我。先前的研究表明，大脑中这些不同的自我领域代表着不同的信息，即领域特异性的自我表现。然而，目前尚不清楚大脑激活的这些差异是由于不同视觉特征的处理还是由于不同领域的自我处理，因为这些研究使用了不同类型的视觉刺激。本研究评估了参与者在呈现自己和他人的名字时的事件相关电位（ERP），这些名字是由参与者自己或其他人生成的。因此，视觉刺激包括自我相关信息的两个领域，即姓名和运动主体，但只有一种刺激（手写姓名）。ERP 结果表明，在后区域中，自我生成的手写姓名的 P250 成分（250-330ms）的振幅小于非自我生成的手写姓名。结果还表明，P300 成分（350-500ms）的振幅对于自我名称大于非自我名称。这些结果表明，对于手写刺激的名称和主体的自我相关信息存在特定于领域的处理。
