Neural Dynamics of Context-sensitive Adjustments in Cognitive Flexibility.
Neural Dynamics of Context-sensitive Adjustments in Cognitive Flexibility.
复制标题
DOI：
10.1162/jocn_a_01813
复制
发表时间：
2022-02-01
影响因子：
3.2
通讯作者：
Woldorff, Marty G.
中科院分区：
文献类型：
--
作者：
Siqi-Liu, Audrey;Egner, Tobias;Woldorff, Marty G.
为了适应日常生活中的不确定性，我们必须使我们的认知灵活性水平与对我们专注于当前任务的能力提出不同要求的情况相匹配，同时对其他更紧急任务的信号保持敏感。这种认知灵活性的调整，以应对不断变化的上下文需求（元灵活性）已被观察到的线索任务切换范式，切换与重复任务（开关成本）的比例成反比的开关（PS）在一个块的试验中所产生的性能成本。然而，这些认知灵活性调整的神经基础还没有得到很好的理解。在这里，我们记录了64通道EEG测量的脑电活动的参与者之间切换的字母和数字分类任务在不同的PS上下文，从中我们提取事件相关电位（ERPs）引起的任务提示和EEG的α功率差异在线索到目标的间隔和休息前提示期。EEG/ERPs的时间分辨率使我们能够测试认知灵活性的上下文调整是否是由处理模式的紧张性变化或阶段性任务提示触发过程的变化介导的。我们观察到可靠的调制行为开关成本PS的背景下，反映在两个线索诱发的ERP和时间-频率效应，但不是在块宽的前线索EEG的变化。这些结果表明，不同水平的认知灵活性的实例化响应任务线索的介绍，而不是通过保持作为一个紧张状态在整个低或高开关上下文。
To adaptively interact with the uncertainties of daily life, we must match our level of cognitive flexibility to situations that place different demands on our ability to focus on the current task while remaining sensitive to cues that signal other, more urgent tasks. Such cognitive-flexibility adjustments in response to changing contextual demands (meta-flexibility) have been observed in cued task-switching paradigms, where the performance cost incurred by switching versus repeating tasks (switch cost) scales inversely with the proportion of switches (PS) within a block of trials. However, the neural underpinnings of these adjustments in cognitive flexibility are not well understood. Here, we recorded 64-channel EEG measures of electrical brain activity as participants switched between letter and digit categorization tasks in varying PS contexts, from which we extracted event-related potentials (ERPs) elicited by the task cue and EEG alpha-power differences during the cue-to-target interval and the resting pre-cue period. The temporal resolution of EEG/ERPs allowed us to test whether contextual adjustments in cognitive flexibility are mediated by tonic changes in processing mode, or by changes in phasic, task-cue-triggered processes. We observed reliable modulation of behavioral switch cost by PS context that were mirrored in both cue-evoked ERP and time-frequency effects, but not in blockwide pre-cue EEG changes. These results indicate that different levels of cognitive flexibility are instantiated in response to the presentation of task cues, rather than by being maintained as a tonic state throughout low- or high-switch contexts.
登录
查看更多内容
影响因子：
8.2
作者：
Foster JJ;Sutterer DW;Serences JT;Vogel EK;Awh E
通讯作者：
Awh E
DOI：
10.1523/jneurosci.0934-12.2012
发表时间：
2012-06-13
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
King JA;Korb FM;Egner T
通讯作者：
Egner T
影响因子：
7.2
作者：
Dreisbach, Gesine;Froeber, Kerstin
通讯作者：
Froeber, Kerstin
影响因子：
9.8
作者：
Grent-'t-Jong T;Woldorff MG
通讯作者：
Woldorff MG
DOI：
10.1016/bs.adms.2015.04.003
发表时间：
2015-01-01
期刊：
ADVANCES IN MOTIVATION SCIENCE, VOL 2
影响因子：
--
作者：
Hommel, Bernhard
通讯作者：
Hommel, Bernhard