Neural correlates of social target value in macaque parietal cortex
Neural correlates of social target value in macaque parietal cortex
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DOI：
10.1016/j.cub.2008.02.047
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发表时间：
2008-03-25
期刊：
影响因子：
9.2
通讯作者：
Platt, Michael L.
中科院分区：
文献类型：
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作者：
Klein, Jeffrey T.;Deaner, Robert O.;Platt, Michael L.
各种动物，如节肢动物[1]，鱼类[2]，爬行动物[3]，鸟类[4]和哺乳动物，包括灵长类动物[5]，都依赖于视觉获得的同类信息来生存和繁殖。例如，配偶定位通常依赖于视觉[6]，视觉线索经常宣传性接受性或表型质量[5]。此外，认识到以前遇到的竞争对手或具有预先确定的领土[7]或优势地位[1，5]的个人可以消除对抗的需要以及相关的精力消耗和受伤的风险。此外，灵长类动物，包括人类，倾向于看同类和他们关注的对象[8，9]，雄性猴子将放弃果汁奖励，以查看高级雄性和雌性生殖器的图像[10]。尽管有这些观察结果，我们对大脑如何评估社会信息或使用这种评估来指导行为知之甚少。在这里，我们发现灵长类动物外侧顶内区（LIP）的神经元，这是一个以前与注意力和扫视规划相关的皮质区域[11，12]，当这种评估影响定向决策时，会发出社会信息价值的信号。相比之下，当猴子不需要做出选择时，社会期望对LIP神经元的活动没有影响。这些结果第一次证明顶叶皮层携带抽象的、独立于模态的目标值信号，这些信号告诉我们去哪里看。
Animals as diverse as arthropods [1], fish [2], reptiles [3], birds [4], and mammals, including primates [5], depend on visually acquired information about conspecifics for survival and reproduction. For example, mate localization often relies on vision [6], and visual cues frequently advertise sexual receptivity or phenotypic quality [5]. Moreover, recognizing previously encountered competitors or individuals with preestablished territories [7] or dominance status [1, 5] can eliminate the need for confrontation and the associated energetic expense and risk for injury. Furthermore, primates, including humans, tend to look toward conspecifics and objects of their attention [8, 9], and male monkeys will forego juice rewards to view images of high-ranking males and female genitalia [10]. Despite these observations, we know little about how the brain evaluates social information or uses this appraisal to guide behavior. Here, we show that neurons in the primate lateral intraparietal area (LIP), a cortical area previously linked to attention and saccade planning [11, 12], signal the value of social information when this assessment influences orienting decisions. In contrast, social expectations had no impact on LIP neuron activity when monkeys were not required to make a choice. These results demonstrate for the first time that parietal cortex carries abstract, modality-independent target value signals that inform the choice of where to look.