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| | Objective: To localize the memory imprinting in the brain. Methods: Event-related potentials (ERPs ) were recorded in 12 healthy young adults using the paradigm called cross-model and delayed response under the following two conditions: ① Attending to the visual modality but ignoring the auditory modality;② Attending to the auditory modality but ignoring the visual modality. The deviance-related components of ERPs was obtained by subtracting the ERPs of the standard stimuli from that of the deviated stimuli... | | 目的:研究脑内记忆痕迹的位置。方法:采用“跨通路延迟反应”实验模式,研究12名正常青年人注意与非注意条件下的事件相关电位(ERPs)。实验分为二项:①注意视觉通路,忽视听觉通路;②注意听觉通路,忽视视觉通路。主要分析偏差刺激ERP减去标准刺激ERP的偏差成分地形图。结果:发现视听通路在注意时最大失匹配负波(MMN)波幅分布于它们的初级感觉投影,而在非注意条件下视听最大MMN波幅均分布于额中央部。结论:对于长期争论的注意早晚期选择理论提出了选择位置具有可塑性这一新见解。 | | 文摘来源 | |   |
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