Brain & Behavior Research Institute and School of Psychology, University of Wollongong, Wollongong, New South Wales 2522, Australia.
Brain & Behavior Research Institute and School of Psychology, University of Wollongong, Wollongong, New South Wales 2522, Australia.
Int J Psychophysiol. 2018 Mar;125:17-28. doi: 10.1016/j.ijpsycho.2018.01.015. Epub 2018 Feb 2.
Substantial research into the brain dynamics underlying cognitive functioning during tasks links the brain's EEG activity to the stimulus-evoked ERP activity. This study focused on examining how the resting state intrinsic EEG, and the change from rest to the task, affect these stimulus-response processes. Forty young adults (aged 20.3 ± 2.3 years) had EEG recorded during eyes-closed (EC) and eyes-open (EO) resting states, and then during an auditory Go/NoGo task. Amplitude in the delta to beta bands was analyzed for the overall resting state EEG, the reactive change from EC to EO, and for the change from EO to the task (termed task-related change here). The relationships between these EEG measures and Go/NoGo behavioral outcomes and ERPs were assessed. Greater resting state delta and theta amplitudes were linked to Go N1-1 enhancements, but only resting state delta correlated with the NoGo N1-1. These relationships replicate previous data and highlight the functional relevance of low frequency intrinsic activity in attentional processes. However, delta increases from EO to the task predicted poorer Go response accuracy and variability, and enhanced Go Slow Wave (SW) positivity. This increase in delta, and smaller alpha-1 increments, were associated with longer mean RTs. Theta increases predicted larger Go N1-1 amplitudes, but lower NoGo accuracy rates, while beta-1 increments were predictive of NoGo SW negativity. These novel effects suggest that task-related EEG changes impact decision-making and cognitive control processes, and subsequent behavioral performance.
大量研究表明，认知任务中大脑的脑电图活动与刺激诱发的事件相关电位活动之间存在关联。本研究旨在探讨静息状态下大脑的固有脑电图以及从静息到任务的转变如何影响这些刺激反应过程。40 名年轻成年人（年龄 20.3±2.3 岁）在闭眼（EC）和睁眼（EO）静息状态下进行脑电图记录，然后进行听觉 Go/NoGo 任务。对整个静息状态脑电图、从 EC 到 EO 的反应性变化以及从 EO 到任务的变化（此处称为任务相关变化）进行了 delta 至 beta 波段的振幅分析。评估了这些脑电图测量值与 Go/NoGo 行为结果和事件相关电位之间的关系。较大的静息状态 delta 和 theta 振幅与 Go N1-1 增强有关，但只有静息状态 delta 与 NoGo N1-1 相关。这些关系复制了以前的数据，并强调了低频固有活动在注意力过程中的功能相关性。然而，从 EO 到任务的 delta 增加预测了较差的 Go 反应准确性和变异性，并增强了 Go 慢波（SW）正性。这种 delta 的增加和较小的 alpha-1 增量与较长的平均 RT 相关。theta 的增加预测了更大的 Go N1-1 幅度，但较低的 NoGo 准确性，而 beta-1 的增加则预示着 NoGo SW 的负性。这些新的效应表明，与任务相关的脑电图变化会影响决策和认知控制过程，以及随后的行为表现。
