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首页> 外文期刊>Cortex: A Journal Devoted to the Study of the Nervous System and Behavior >Gambling against neglect: Unconscious spatial biases inducedby reward reinforcement in healthy people andbrain-damaged patients
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Gambling against neglect: Unconscious spatial biases inducedby reward reinforcement in healthy people andbrain-damaged patients

机译：反对疏忽赌博：健康人和脑部受损患者的奖赏增强导致潜意识的空间偏见

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摘要

Orienting attention in space recruits fronto-parietal networks whose damage results in unilateral spatial neglect. However, attention orienting may also be governed by emotional and motivational factors; but it remains unknown whether these factors act through a modulation of the fronto-parietal attentional systems or distinct neural pathways. Here we asked whether attentional orienting is affected by learning about the reward value of targets in a visual search task, in a spatially specific manner, and whether these effects are preserved in right-brain damaged patients with left spatial neglect. We found that associating rewards with left-sided (but not right-sided) targets during search led to progressive exploration biases towards left space, in both healthy people and neglect patients. Such spatially specific biases occurred even without any conscious awareness of the asymmetric reward contingencies. These results show that reward-induced modulations of space representation are preserved despite a dysfunction of fronto-parietal networks associated with neglect, and therefore suggest that they may arise through spared subcortical networks directly acting on sensory processing and/or oculomotor circuits. These effects could be usefully exploited for potentiating rehabilitation strategies in neglect patients.
机译：在太空中定向注意力会招募额顶网络，其损害会导致单方面的空间忽视。但是，注意导向也可能受情绪和动机因素的影响;但是，这些因素是否通过调节额顶注意系统或不同的神经途径起作用尚不清楚。在这里，我们问是否通过以空间特定的方式了解视觉搜索任务中目标的奖励价值是否会影响注意力定向，以及这些影响是否在保留了左空间的右脑受损患者中得以保留。我们发现，在健康人和被忽视的患者中，搜索过程中将奖励与左侧（而非右侧）目标相关联会导致探索性偏向左侧空间的偏见。即使没有意识地意识到不对称奖励偶然性，也会发生这种空间特定的偏见。这些结果表明，尽管与忽略有关的额顶网络功能失调，但仍保留了奖励诱导的空间表征调制，因此建议它们可能通过直接作用于感觉处理和/或动眼神经回路的备用皮层下网络产生。这些效果可有效地用于增强被忽视患者的康复策略。

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