Generators of the late cognitive potentials in auditory and visual oddball tasks
Generators of the late cognitive potentials in auditory and visual oddball tasks
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听觉和视觉奇异任务中的后期认知电位产生器
DOI：
10.1016/s0013-4694(97)00119-3
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发表时间：
1998-02-01
期刊：
影响因子：
--
通讯作者：
Chauvel, P
中科院分区：
文献类型：
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作者：
Halgren, E;Marinkovic, K;Chauvel, P
直接在脑内记录可以建立局部诱发电位生成，而不会产生颅外电磁测量所带来的模糊性。深度记录发现，感官刺激激活初级皮层，然后激活材料特定的编码器。特定的感觉区域在很长一段时间内保持活跃，但到大约200毫秒时，广泛的大脑系统就会被激活。一个系统与注意力的方向有关。它集中在边缘和注意额顶扣带皮层，并与P3a相关。第二个系统与P3b信封认知语境整合。它涉及腹侧颞额事件编码皮层（颞下、鼻周和腹外侧前额叶）、联合皮层（上级颞沟和后顶叶）和海马。因此，即使在简单的任务中，激活也是广泛的，但集中在特定的多叶系统中。有了这些信息，晚期认知电位可以用来监测认知任务期间大脑激活的可能位置、时间和强度。(C)1998爱思唯尔科学爱尔兰有限公司
Recordings directly within the brain can establish local evoked potential generation without the ambiguities always associated with extracranial electromagnetic measures. Depth recordings have found that sensory stimuli activate primary cortex and then material-specific encoders. Sensory-specific areas remain active for long periods, but by about 200 ms are joined by activation in widespread brain systems. One system is related to the orientation of attention. It is centered in paralimbic and attentional frontoparietocingular cortex, and associated with the P3a. A second system associated with P3b envelopes cognitive contextual integration. It engages the ventral temporofrontal event-encoding cortices (inferotemporal, perirhinal, and ventrolateral prefrontal), association cortices (superior temporal sulcal and posterior parietal), and the hippocampus. Thus, even in simple tasks, activation is widespread but concentrated in particular multilobar systems. With this information, the late cognitive potentials can be used to monitor the probable location, timing and intensity of brain activation during cognitive tasks. (C) 1998 Elsevier Science Ireland Ltd.