Vision Sensing Lab., Technology Research Center, Technology and Intellectual Property H.Q., OMRON Corporation, Kyoto, Japan.
Faculty of Computing, University of Latvia, Riga, Latvia.
Sci Rep. 2022 Nov 3;12(1):18545. doi: 10.1038/s41598-022-21624-3.
It has been well-documented that brain regions related to a task are activated during the task performance. We investigated whether brain activity and functional connectivity during the rest period are affected by the preceding task. Participants performed visual search tasks with three search conditions, which were followed by a rest period. During the rest period, participants were asked to look at the display that did not show any visual stimuli. In the result, brain activity in occipital and superior parietal regions would be deactivated by the preceding task during the rest period after visual search tasks. However, the activity of the inferior frontal gyrus during the rest period, which is also part of the attention network, was not affected by the brain activity during the preceding visual search task. We proposed a new model for explaining how the cognitive demands of the preceding visual search task regulate the attention network during the rest period after the task. In this model, the cognitive demand changes with task difficulty, which affects the brain activity even after removing the visual search task in the rest phase.
已有充分的文献证明，在执行任务期间，与任务相关的大脑区域会被激活。我们研究了在休息期间，先前任务是否会影响大脑活动和功能连接。参与者进行了三种搜索条件的视觉搜索任务，然后是休息期。在休息期间，要求参与者注视不显示任何视觉刺激的显示器。结果表明，在视觉搜索任务后的休息期间，先前任务会使枕叶和顶叶区域的大脑活动失活。然而，注意网络的一部分，即额下回的活动在休息期间不受先前视觉搜索任务的大脑活动的影响。我们提出了一个新的模型来解释先前的视觉搜索任务的认知需求如何在任务后的休息期间调节注意网络。在这个模型中，认知需求随任务难度而变化，即使在休息阶段去除了视觉搜索任务，它也会影响大脑活动。
