Monetary incentives enhance processing in brain regions mediating top-down control of attention
Monetary incentives enhance processing in brain regions mediating top-down control of attention
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DOI：
10.1093/cercor/bhi063
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发表时间：
2005-12-01
期刊：
影响因子：
3.7
通讯作者：
Mesulam, MM
中科院分区：
文献类型：
--
作者：
Small, DM;Gitelman, D;Mesulam, MM
为了评价抽象动机激励对自上而下视觉空间注意机制的影响，10名被试在三种不同的激励条件下对空间有效(预测性)、无效(误导性)或中性中央线索的目标进行了反应：赢钱(赢)、输钱(输)和中性(既不赢也不输)。后扣带回皮质的激活与视觉空间期望相关，视觉空间期望被定义为有效线索对表现的益处程度，与非方向性线索相比，反应时间更快就是明证。赢钱和输钱通过重叠但独立的边缘机制加强了这种关系。此外，顶下小叶的活动与脱离(无效提示降低表现的程度)相关。这种关系也通过货币激励得到了加强。最后，对于两种类型的激励(赢与输)，激励增强了视觉皮质中的激活与视觉空间期望和脱离的关系。这些结果表明，抽象激励以过程选择性和价态选择性的方式促进了注意网络中的神经加工。他们还表明，不同的认知和动机机制可能会对单峰皮质产生共同的影响，以增强加工，以服务于当前的行为目标。
To evaluate the effect of an abstract motivational incentive on top-down mechanisms of visual spatial attention, 10 subjects engaged in a target detection task and responded to targets preceded by spatially valid (predictive), invalid (misleading) or neutral central cues under three different incentive conditions: win money (WIN), lose money (LOSE), and neutral (neither gain nor lose). Activation in the posterior cingulate cortex was correlated with visual spatial expectancy, defined as the degree to which the valid cue benefited performance as evidenced by faster reaction times compared to non-directional cues. Winning and losing money enhanced this relationship via overlapping but independent limbic mechanisms. In addition, activity in the inferior parietal lobule was correlated with disengagement (the degree to which invalid cues diminished performance). This relationship was also enhanced by monetary incentives. Finally, incentive enhanced the relationship of activation in the visual cortex to visual spatial expectancy and disengagement for both types of incentive (WIN and LOSE). These results show that abstract incentives enhance neural processing within the attention network in a process-and valence-selective manner. They also show that different cognitive and motivational mechanisms may produce a common effect upon unimodal cortices in order to enhance processing to serve the current behavioral goal.