Linking inter-individual differences in the perceptual load effect to spontaneous brain activity.
Linking inter-individual differences in the perceptual load effect to spontaneous brain activity.
复制标题
将感知负荷效应的个体差异与自发大脑活动联系起来
DOI：
10.3389/fnhum.2015.00409
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发表时间：
2015
影响因子：
2.9
通讯作者：
Chen A
中科院分区：
文献类型：
--
作者：
Liu L;Tan J;Chen A
先前的研究广泛表明，当任务负荷较高时，周围干扰物的干扰会减少。然而，迄今为止，还没有研究关注知觉负荷效应（PLE）的个体差异，并且对于静息状态下与 PLE 相关的自发大脑活动知之甚少。为了研究这个问题，我们使用静息态功能磁共振成像 (fMRI) 来检查低频波动 (ALFF) 幅度与 PLE 之间的关系。结果显示，PLE 存在较大的个体差异，我们发现 PLE 与左颞下回（ITG）和左中央前/中央后回的 ALFF 显着相关。本研究表明 PLE 是可测量的，并且这种效果存在个体差异。此外，这些结果表明：1）对有限能力的相互竞争，这涉及视觉注意力，2）包含在行为反应中的反应控制都可能有助于感知负荷引起的调节。
Previous researches have widely demonstrated that the interference from peripheral distractor will decrease when the task load is high. However, no study to date has paid attention to the individual differences in perceptual load effect (PLE) and little is known of spontaneous brain activity associated with PLE during resting state. To investigate this issue, we used resting-state functional Magnetic Resonance Imaging (fMRI) to examine the relationship between the amplitude of low-frequency fluctuations (ALFFs) and PLE. The results showed that there were large individual differences in PLE and we found PLE was significantly associated with ALFFs in left inferior temporal gyrus (ITG) and left precentral/postcentral gyrus. The present study suggested that the PLE was measurable, and there were individual differences in this effect. Moreover, these results implicated that: 1) mutual competition for limited capacity, which is involved in visual attention, and 2) response control that is included in behavior response both may contribute to the modulation induced by perceptual load.