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Studying semantics in the brain: the rapid stream stimulation paradigm.

机译:研究大脑中的语义:快速流刺激范例。

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摘要

Event-related potentials (ERPs) provide information about the temporal course of cognitive processes in the brain. They have proved to be a valuable tool in order to explore semantic aspects of word processing. However, to date, research in this field has been mostly concerned with the study of post-lexical features by means of the N400-paradigm. We introduce here the rapid stream stimulation paradigm, in which stimuli reflecting different levels of linguistic information are presented to subjects at a high rate of stimulation. The present protocol shows in detail how this paradigm can be applied. The application of the rapid stream stimulation paradigm evokes the recognition potential (RP), an ERP component that peaks at around 260 ms after stimuli onset and seems to be reflecting lexical selection processes. Results of studies that revealed the sensibility of the RP to visual-semantic aspects and the location of its neural generators within basal extrastriate areas are reported. Although some research has been conducted with the rapid stream stimulation paradigm much remains still to be done. Some of the possibilities that this paradigm offers are further discussed.
机译:事件相关电位(ERP)提供有关大脑认知过程的时间过程的信息。为了探索文字处理的语义方面,它们被证明是有价值的工具。但是,迄今为止,该领域的研究主要涉及通过N400范式对后词汇特征的研究。我们在这里介绍了快速流刺激范例,其中反映不同语言信息水平的刺激以很高的刺激率呈现给对象。本协议详细显示了如何应用此范例。快速流刺激范例的应用唤起了识别潜能(RP),这是一个ERP组件,在刺激发作后约260 ms达到峰值,似乎反映了词汇选择过程。研究结果表明,RP对视觉语义方面的敏感性及其在基底外纹状体区域内神经生成器的位置。尽管已经对快速流刺激范例进行了一些研究,但仍有许多工作要做。此范式提供的一些可能性将进一步讨论。

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