Doidge Amie N, Evans Lisa H, Herron Jane E, Wilding Edward L
College of Life and Environmental Sciences, School of Psychology, Exeter University, UK.
Cardiff University Brain Research Imaging Centre (CUBRIC), School of Psychology, Cardiff University, UK.
Cortex. 2017 Jan;86:1-10. doi: 10.1016/j.cortex.2016.10.003. Epub 2016 Oct 19.
According to cortical reinstatement accounts, neural processes engaged at the time of encoding are re-engaged at the time of memory retrieval. The temporal precision of event-related potentials (ERPs) has been exploited to assess this possibility, and in this study ERPs were acquired while people made memory judgments to visually presented words encoded in two different ways. There were reliable differences between the scalp distributions of the signatures of successful retrieval of different contents from 300 to 1100 ms after stimulus presentation. Moreover, the scalp distributions of these content-sensitive effects changed during this period. These findings are, to our knowledge, the first demonstration in one study that ERPs reflect content-specific processing in two separable ways: first, via reinstatement, and second, via downstream processes that operate on recovered information in the service of memory judgments.
根据皮层恢复理论，编码时参与的神经过程在记忆提取时会再次被激活。事件相关电位（ERP）的时间精度已被用于评估这种可能性，在本研究中，当人们对以两种不同方式编码的视觉呈现单词进行记忆判断时，记录了ERP。刺激呈现后300至1100毫秒内，成功提取不同内容的信号在头皮分布上存在可靠差异。此外，在此期间，这些内容敏感效应的头皮分布发生了变化。据我们所知，这些发现首次在一项研究中证明，ERP以两种可分离的方式反映特定内容的加工：第一，通过恢复；第二，通过对恢复信息进行操作以服务于记忆判断的下游过程。
