Primates chunk simultaneously-presented memoranda.
Primates chunk simultaneously-presented memoranda.
复制标题
灵长类动物同时发生的备忘录。
DOI：
10.3389/fnbeh.2022.1060193
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发表时间：
2022
影响因子：
3
通讯作者：
中科院分区：
文献类型：
--
作者：
虽然许多研究已经描述了非人类灵长类动物中单个目标的空间记忆行为和电生理学特征，但我们对多个记忆是如何处理的知之甚少。多个记忆可能在大脑中相互作用，影响潜在的表征。众所周知，记忆资源是有限的，因此项目可能会争夺内存中的“空间”，或者可能会以合作或组合的方式进行编码。了解相互作用的模式将为未来的神经研究提供信息。作为第一步，我们量化了多项目空间记忆任务期间的相互作用。向两只猴子显示1-4个目标位置。延迟一段时间后，目标再次出现，并有一个新的目标，动物因固定新目标而获得奖励。目标可以同时出现（同时），也可以延迟出现（顺序）。我们量化了与记忆率相关性的相互作用程度。我们发现，同时提出的目标存储合作，而顺序提出的目标存储独立。这些研究结果表明，同时记忆项目之间的相互作用取决于任务的上下文。未来的多项目记忆研究将通过设计实验来控制或测量这种相互作用的模式。
Though much research has characterized both the behavior and electrophysiology of spatial memory for single targets in non-human primates, we know much less about how multiple memoranda are handled. Multiple memoranda may interact in the brain, affecting the underlying representations. Mnemonic resources are famously limited, so items may compete for “space” in memory or may be encoded cooperatively or in a combined fashion. Understanding the mode of interaction will inform future neural studies. As a first step, we quantified interactions during a multi-item spatial memory task. Two monkeys were shown 1–4 target locations. After a delay, the targets reappeared with a novel target and the animal was rewarded for fixating the novel target. Targets could appear either all at once (simultaneous) or with intervening delays (sequential). We quantified the degree of interaction with memory rate correlations. We found that simultaneously presented targets were stored cooperatively while sequentially presented targets were stored independently. These findings demonstrate how interaction between concurrently memorized items depends on task context. Future studies of multi-item memory would be served by designing experiments to either control or measure the mode of this interaction.
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