自我身体照片认知加工过程中的早期皮层电位

Early Event-related Potentials in the Cognitive Processing of Self-Body Picture

在被试进行身体照片认知加工的同时记录其事件相关电位,探讨了自我身体照片和他人身体照片早期认知加工的差异。研究结果表明:自我身体照片和他人身体照片都诱发3个早期成分(N60、P100和N170)。N60的分析没有发现任何效应;P100具有身体照片类型和认知任务类型的交互效应,在主动身体照片方向判断认知任务下,自我身体照片产生的P100波幅大于他人身体照片;N170有身体照片类型主效应,自我身体照片比他人身体照片诱发更大N170。这一结果提示我们:自我身体照片和他人身体照片的认知加工从170 ms左右开始分离。

Recording event-related potentials in the meanwhile of processing the subjects＇ body pictures, the paper discusses the difference of early processing between the self-body and others＇ body. The result presents that there are three early components （N60, P100 and N170） evoked by self-body and others; body. The analysis on N60 presents nothing; P100 has the interactive effects on body picture genre and cognitive rusk genre, in the condition of the initiative body direction cognitive task, the P100 wave resulted from.n self body is higher that resulted from others＇ body; the analysis on N170 presents body style main effect, and N170 evoked by self body is higher than by others＇. This result shows us： 170ms shall be the break point of processing of self body and others＇.