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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >Shared Neural Mechanisms for the Evaluation of Intense Sensory Stimulation and Economic Reward, Dependent on Stimulation-Seeking Behavior
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Shared Neural Mechanisms for the Evaluation of Intense Sensory Stimulation and Economic Reward, Dependent on Stimulation-Seeking Behavior

机译：共享的神经机制，用于评估强烈的感觉刺激和经济奖励，取决于寻求刺激的行为

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摘要

Why are some people strongly motivated by intense sensory experiences? Here we investigated how people encode the value ofan intense sensory experience compared with economic reward, and how this varies according to stimulation-seeking preference. Specifically, we used a novel behavioral task in combination with computational modeling to derive the value individuals assigned to the opportunity to experience an intense tactile stimulus (mild electric shock). We then examined functional imaging data recorded during task performance to see how the opportunity to experience the sensory stimulus was encoded in stimulation-seekers versus stimulation-avoiders. We found that for individuals who positively sought out this kind of sensory stimulation, there was common encoding of anticipated economic and sensory rewards in the ventromedial prefrontal cortex. Conversely, there was robust encoding of the modeled probability of receiving such stimulation in the insula only in stimulation-avoidant individuals. Finally, we found preliminary evidence that sensory prediction error signals may be positively signed for stimulation-seekers, but negatively signed for stimulation-avoiders, in the posterior cingulate cortex. These findings may help explain why high intensity sensory experiences are appetitive for some individuals, but not for others, and may have relevance for the increased vulnerability for some psychopathologies, but perhaps increased resilience for others, in high sensation-seeking individuals.
机译：为什么有些人会被强烈的感官体验所激发？在这里，我们研究了人们如何将强烈的感官体验的价值与经济奖励相比进行编码，以及其如何根据寻求刺激的偏好而变化。具体来说，我们将新颖的行为任务与计算模型结合使用，以得出被赋予体验强烈的触觉刺激（轻度电击）机会的个人价值。然后，我们检查了在任务执行过程中记录的功能成像数据，以了解在寻求刺激者与避免刺激者中如何编码体验感觉刺激的机会。我们发现，对于积极寻求这种感觉刺激的个体，腹侧前额叶皮层中存在预期的经济和感觉奖励的通用编码。相反，仅在避免刺激的个体中对在岛绝缘中接受这种刺激的建模概率进行了可靠的编码。最后，我们发现了初步的证据，即在后扣带回皮质中，对于寻求刺激的人来说，感觉预测误差信号可能是正号，而对于避免刺激的人是负号。这些发现可能有助于解释为什么高强度感官体验对某些人具有吸引力，而对另一些人却不具有吸引力，并且可能与某些寻求高感官的人的某些心理病理学易感性增加有关，而对另一些人的适应力却有所增加。

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