【摘要】 我们采用汉字短时记忆—辩识测试作为刺激事件，研究了在认知过程中４０Ｈｚ脑电事件相关电位（４０ＨｚＥＲＰｓ）的分维特性。结果表明，在这类认知过程中，左右半球４０ＨｚＥＲＰｓ的分维数存在明显的不对称，同时，在记忆和辨识过程中，４０ＨｚＥＲＰｓ存在较大差异。这表明，由４０ＨｚＥＲＰｓ所表现的大脑动力学特性在左右半球之间及不同认知过程中有较大的不同更多还原

【Abstract】 y using Chinese words as the stimulus events, we undertake the study of fractal dimension property of 40Hz EventRelated Potentials(40Hz ERPs) under shortterm memoryrecognition tasks. The results indicate that there is great difference in fractal dimension of 40Hz ERPs between the left and right hemisphere, and meanwhile, the distinction of dimension property under memory and recognition tasks is also obvious. All of these phenomena may imply that the brain dynamics property presented by 40Hz ERPs show notable difference between the two hemispheres or between different cognitive tasks.更多还原