Motor planning in different grasping tasks by capuchin monkeys (Sapajus spp.)
Motor planning in different grasping tasks by capuchin monkeys (Sapajus spp.)
复制标题
卷尾猴（Sapajus spp.）不同抓取任务中的运动规划
DOI：
10.1016/j.bbr.2016.06.010
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发表时间：
2016
影响因子：
2.7
通讯作者：
V. Truppa
中科院分区：
文献类型：
--
作者：
G. Sabbatini;Giusy Meglio;V. Truppa
关于物体使用中的运动规划和动作选择的研究表明，我们现在选择做什么取决于我们下一个计划的动作。特别是，许多研究表明，成年人最初采取不舒服的手势来适应后来的任务要求(即结束状态的舒适性效应)。最近对不同非人类灵长类物种的行动计划的研究提供了截然不同的结果。在这里，我们测试了卷尾猴(Sapajuspp.)，自然工具使用者，是否会在两个复杂程度不同的任务中表现出计划能力：(I)涉及自我定向动作的物体提取任务(实验1)和(Ii)涉及针对外部目标的动作的工具使用任务(实验2)。在实验一中，10只猴子中有6只优先使用径向抓握(即拇指朝向有诱饵的一端)，抓住水平的桩，左右两端都有诱饵，并将其送到嘴里。在实验2中，所有六只被测试的卷尾猴都优先使用径向抓握(即拇指一侧朝向桩的中心)来抓住水平放置在不同方向的桩，并取出够不着的食物奖励。因此，我们发现卷尾猴在两个任务中都表现出二级计划能力，但在不同阶段的手偏好和学习方面出现了绩效差异。我们的发现支持二级运动计划发生在灵长类谱系的早期阶段的观点。讨论了在动作选择中影响非人类灵长类动物估计运动成本能力的因素。
Studies on motor planning and action selection in object use reveal that what we choose to do in the present moment depends on our next planned action. In particular, many studies have shown that adult humans initially adopt uncomfortable hand postures to accommodate later task demands (i.e., the end-state comfort effect). Recent studies on action planning in different non-human primates species have provided contrasting results. Here, we tested whether capuchin monkeys (Sapajusspp.), natural tool users, would show planning abilities in two tasks with varying complexity: (i) an object-retrieval task involving self-directed actions (Experiment 1) and (ii) a tool-using task involving actions directed toward an external target (Experiment 2). In Experiment 1, six of 10 monkeys preferentially used a radial grip (i.e., with the thumb-side oriented towards the baited end) to grasp a horizontal dowel with either the left- or right-end baited and bring it to their mouth. In Experiment 2, all six tested capuchins preferentially used a radial grip (i.e., with the thumb-side oriented towards the center of the dowel) to grasp a dowel that was positioned horizontally at different orientations and to dislodge an out-of-reach food reward. Thus, we found that the capuchins showed second-order planning abilities in both tasks, but performance differences emerged in relation to hand preference and learning across sessions. Our findings support the idea that second-order motor planning occurred in an early stage of the primate lineage. Factors affecting the ability of nonhuman primates to estimate motor costs in action selection are discussed.