The importance of single trials: temporal and spatial resolution in event-related potential research.
The importance of single trials: temporal and spatial resolution in event-related potential research.
复制标题
单次试验的重要性：事件相关潜力研究中的时间和空间分辨率。
DOI：
10.1080/87565641.2012.674994
复制
发表时间：
2012
影响因子：
1.5
通讯作者：
Tucker,DonM
中科院分区：
文献类型：
--
作者：
Waters,AllisonC;Song,JungEun;Luu,Phan;Tucker,DonM
在事件相关电位（ERP）研究中，许多试验的平均电位是一个有用的测量方法，但它模糊了试验之间可能具有重要功能的时间变异性。熟悉的ERP成分已被证明反映了在事件发生前不同程度存在的振荡活动的相移。即使是单次试验，了解潜在的神经活动也可能需要处理头部表面电极上神经信号的空间叠加的方法。我们用一个例子来总结，在这个例子中，特质焦虑对平均erp的调节可能与θ波振荡的潜在来源有关。
In event-related potential (ERP) research, the average potential over many trials is a useful measure, but it obscures temporal variability across trials that may be functionally significant. Familiar ERP components have been shown to reflect the phase shifting of oscillatory activity that is present in varying degrees before the event. Even with single trials, understanding the underlying neural activity may require methods of dealing with the spatial superposition of neural signals at the head surface electrodes. We conclude with an illustration in which the modulation of averaged ERPs by trait anxiety may be related to underlying sources of theta oscillations.