语言刺激对镜像神经系统激活情况的研究

镜像神经元在人类的动作理解，言语与语言，共情等方面都有深刻的影响，言语知觉的运动理论更是验证了镜像神经系统在人体中的重要作用.本文通过图片、音频、有声嘴部动作视频作为实验刺激，采集被试默读不同汉字时的脑电，进行预处理与时频分析，采用共空间模式生成脑电地形图，利用支持向量机得到3种刺激材料下不同状态的分类正确率.结果表明：随着刺激针对感官维度的加深，被试大脑运动皮层有明显激活，且激活范围更加集中明显，分类正确率也相应提升.音频刺激相对于图片刺激，两字的分类正确率总平均提高2.5%.视频刺激相对于图片刺激，两字的分类正确率总平均提高4.3%，为以后应用于临床脑损伤治疗做准备.

Research on the Activation of Mirror Nervous System by Speech Stimulation

Mirror neurons have profound influence on multiple aspects of human including action understanding, speech and language, empathy and so on. Motor theory of speech perception has verified the important role of mirror nervous system in human body. Based on this, the electroencephalography (EEG) of the subjects was collected in the form of pictures, audios and voice mouth action videos when they read some different Chinese characters silently. The EEG topographic maps were generated by common spatial pattern (CSP), and the classification accuracy of different states of three stimuli was obtained by using support vector machine (SVM). The results showed that with the deepening of sensory stimulation in dimension, the motor cortices of the subjects were significantly activated, the activated area was more concentrated, and the classification accuracy was improved accordingly. The classification accuracy of two words of the audio and video stimuli increased by an average of 2.5% and 4.3% respectively compared that with image stimulus. This study will lay the groundwork for the clinical treatment of brain injury in the future.