用脑电地形图研究汉语认知的脑机制

The Brain Mechanism of Chinese Cognition Researched with BEAM

４０名正常被试在５场言语作业及２场非言语对照作业时记录ＥＥＧ，计算各场中１６个电极上δ，θ，α＿１，α＿２，β频带的功率值，并与静息睁、闭眼时相应的功率值比较，以了解大脑各区域的激活状况，结果表明不论言语或非言语作业均有大脑两半球的参预，言语作业时均为左半球激活占优势．本研究既支持汉语认知为左半球优势的观点，也证明汉字是两半球共同加工的“复脑文字”．

In fourty normal subjects,EEG was recorded during five verbal tasks and two non-verbal tasks as control.Delta,theta,alpha 1,alpha 2 and beta band powers from sixteen electrodes were calculated in each task and then compared with relevant band powers at open-ning-eye-rest phase and closing-eye-rest phase so as to find out the activated statements of each cerebral area. The results showed,whether for verbal or non-verbal tasks,two hemispheres were both involved,and during verbal tasks the activations on left hemisphere were dominant.This study agreed with the point of view that left hemisphere occupies a dominant position in Chinese cognition and proved that Chinese characters are elaborated by left and right hemispheres simultaneously.