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首页> 外文期刊>Journal of Neurophysiology >Individual differences in intrinsic brain connectivity predict decision strategy
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Individual differences in intrinsic brain connectivity predict decision strategy

机译：内在大脑连通性的个体差异预测决策策略

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摘要

When humans are provided with ample time to make a decision, individual differences in strategy emerge. Using an adaptation of a well-studied decision making paradigm, motion direction discrimination, we probed the neural basis of individual differences in strategy. We tested whether strategies emerged from moment-to-moment reconfiguration of functional brain networks involved in decision making with task-evoked functional MRI (fMRI) and whether intrinsic properties of functional brain networks, measured at rest with functional connectivity MRI (fcMRI), were associated with strategy use. We found that human participants reliably selected one of two strategies across 2 days of task performance, either continuously accumulating evidence or waiting for task difficulty to decrease. Individual differences in decision strategy were predicted both by the degree of task-evoked activation of decision-related brain regions and by the strength of pretask correlated spontaneous brain activity. These results suggest that spontaneous brain activity constrains strategy selection on perceptual decisions.
机译：当为人类提供充足的时间来做出决定时，就会出现策略上的个体差异。使用经过充分研究的决策范例，运动方向识别的改编，我们研究了策略中个体差异的神经基础。我们测试了通过任务诱发的功能性MRI（fMRI）进行决策时所涉及的功能性大脑网络的从头到尾的重新配置是否产生了策略，以及是否通过功能连接性MRI（fcMRI）进行了测量，来确定功能性大脑网络的内在特性是否与策略使用相关联。我们发现人类参与者在任务执行的两天中可靠地选择了两种策略之一，要么不断地收集证据，要么等待任务难度降低。决策策略的个体差异既可以通过任务诱发的与决策相关的大脑区域的激活程度，也可以通过与任务相关的自发性脑活动的强度来预测。这些结果表明，自发性脑活动限制了知觉决策的策略选择。

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