Zhang Yihui, Xie Musi, Wang Yuzhi, Qin Pengmin
Key Laboratory of Brain, Cognition and Education Sciences, Ministry of Education, South China Normal University, Guangzhou 510631, China.
Center for Studies of Psychological Application, School of Psychology, South China Normal University, Guangzhou 510631, China.
Brain Sci. 2022 Mar 21;12(3):411. doi: 10.3390/brainsci12030411.
The self is one of the most important concepts in psychology, which is of great significance for human survival and development. As an important self-related stimulus, the subject's own name (SON) shows great advantages in cognitive and social processing and is widely used as an oddball stimulus in previous studies. However, it remained unknown whether the multiple repetition of stimulus would have similar influence on the neural response to SON and the other names under equal probability. In this study, adopting EEG and an equal-probability paradigm, we first detected the SON-related ERP components which could differentiate SON from other names, and then investigated how these components are influenced by repeated exposure of the stimulus. Our results showed that SON evoked an earlier SON-related negativity (SRN) at the fronto-central region and a late positive potential (LPP) at the centro-parietal region. More intriguingly, the earlier SRN demonstrated reduction after multiple repetitions, whereas LPP did not exhibit significant changes. In conclusion, these findings revealed that multiple repetitions of the stimulus might influence the various temporal stages in SON-related processing and highlighted the robustness of the late stage in this processing.
自我是心理学中最重要的概念之一，对人类的生存和发展具有重要意义。作为一种重要的自我相关刺激，个体自身的名字（SON）在认知和社会加工方面具有显著优势，并且在以往研究中被广泛用作异常刺激。然而，在等概率条件下，刺激的多次重复是否会对SON及其他名字的神经反应产生类似影响仍不清楚。在本研究中，我们采用脑电图（EEG）和等概率范式，首先检测能够区分SON与其他名字的SON相关事件相关电位（ERP）成分，然后研究这些成分如何受到刺激重复呈现的影响。我们的结果表明，SON在前额中央区域诱发了一个较早出现的SON相关负波（SRN），在中央顶叶区域诱发了一个较晚出现的正波（LPP）。更有趣的是，多次重复后，较早出现的SRN有所降低，而LPP没有表现出显著变化。总之，这些发现揭示了刺激的多次重复可能会影响SON相关加工的不同时间阶段，并突出了该加工后期阶段的稳健性。
