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利用128导事件相关电位技术,对19名正常被试在言语、峰鸣声和音乐刺激上产生的脑电早期外源性成分N1进行了考察。实验结果发现,在音素条件和蜂鸣声条件下,左侧额叶N1波幅显著高于右侧。偶极子溯源分析发现音素条件和蜂鸣声条件下的偶极子都位于左脑额叶,而音乐条件下的两个偶极子位于右脑额叶。证明范畴属性对信号加工大脑半球优势的影响在加工的早期就开始发挥作用。
Using 128-lead event-related potential technique, 19 normal subjects were examined for the exogenous N 1, an early component of EEG produced by speech, mongling and music stimulation. The experimental results show that in the condition of phoneme and beep, the left frontal lobe N1 amplitude was significantly higher than the right side. Dipole tracing analysis found that the dipole under the condition of phoneme and beep were all located in the frontal lobe of the left hemisphere while the two dipoles under the condition of music were located in the frontal lobe of the right hemisphere. The effect of category attributes on the signal processing hemispheric advantage begins to play a role in the early stages of processing.