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首页> 外文期刊>The European Journal of Neuroscience >Exploration of the dynamics between brain regions associated with the default-mode network and frontostriatal pathway with regards to task familiarity
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Exploration of the dynamics between brain regions associated with the default-mode network and frontostriatal pathway with regards to task familiarity

机译：关于任务熟悉程度的默认模式网络与前体途径相关的大脑区域动态的探讨

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摘要

Specific brain regions have consistently been reported to be activated during resting state period, and they were described as being part of a particular network called the default-mode network (DMN). It has been shown that the DMN would deactivate during goal-directed tasks, but the actual relationship between them is still a matter of debate. In a previous study, we reported a specific pattern of activation of the frontostriatal regions during a set-shifting task in which these regions were increasing their activity as set-shifts were performed continuously and decreasing when the same rule was executed repeatedly. The present study aimed at assessing the relationship between the frontostriatal regions and the DMN. We hypothesized that the DMN would be anticorrelated with the frontostriatal regions so the DMN would be more deactivated as set-shifts are executed for a long period, but would start increasing when the same rule is being executed for a long period. Here, 15 participants underwent functional magnetic resonance imaging while performing a card-sorting task. We observed increased activity in the frontostriatal regions as more set-shifts are being performed while the DMN gets more deactivated. Interestingly, as decreased activity was observed in the frontostriatal regions during the execution of the same rule for a long period, the DMN showed increasing activity. We argue that there is an anticorrelation between the frontostriatal regions and the DMN, but also that the DMN could show positive activation during performance of a familiar goal-directed task.
机译：据报道，在休息状态期间始终始终始终激活特定的脑区，并且它们被描述为称为默认模式网络（DMN）的特定网络的一部分。已经表明，DMN将在目标定向任务期间停用，但它们之间的实际关系仍然是辩论问题。在先前的研究中，我们在设定的转移任务期间报道了前截图区域的特定模式，其中这些区域正在增加它们的活性，因为在重复执行相同规则时连续进行并减小来执行它们的活动。本研究旨在评估前体区域和DMN之间的关系。我们假设DMN将与前端区域掩护，使得DMN将更加停用，因为设量长时间执行，但是当长时间执行相同的规则时，将开始增加。这里，15名参与者在执行卡排序任务时接受了功能磁共振成像。随着DMN更加停用的同时执行更多设定的偏移，我们观察到前段地区的增加的活动。有趣的是，由于在长期执行相同规则期间在前段地区观察到的活动减少，DMN表现出增加的活动。我们认为，前体区域与DMN之间存在反对，也是DMN在熟悉的目标定向任务的性能期间可以显示出积极的激活。

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