Memory capacity and prioritization in female mice.

Memory capacity and prioritization in female mice.
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DOI:
10.1038/s41598-023-40976-y
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发表时间:
2023-08-28
期刊:
影响因子:
4.6
通讯作者:
--
中科院分区:
综合性期刊3区
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--
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我们大脑的记忆存储容量可能很大,但仍然有限。鉴于我们无法记住全部经历,我们的大脑如何选择记住什么和忘记什么?就像医院急诊室的分诊一样,紧急情况会被优先处理,不太危重的患者会被延迟甚至得不到护理,大脑也被认为经历了类似的记忆分诊过程。最近的显着记忆优先进行巩固,这有助于在大脑中创建稳定、长期的表征;不太显着的记忆的优先级较低,如果没有充分巩固,最终会被遗忘(Stickgold 和 Walker in Nat Neurosci 16(2):139–145, 2013)。虽然啮齿动物是研究记忆巩固的主要模型,但常见的行为测试通常依赖于有限数量的项目或上下文,并且完全在受试者的记忆能力范围内。记忆测试可以让我们超越动物的记忆能力,这是研究记忆如何选择性强化或遗忘的关键。在这里,我们报告了一项新的连续新颖物体识别任务,旨在测量记忆容量和优先级,我们使用雌性小鼠对其进行了测试和验证。
Our brain’s capacity for memory storage may be vast but is still finite. Given that we cannot remember the entirety of our experiences, how does our brain select what to remember and what to forget? Much like the triage of a hospital’s emergency room, where urgent cases are prioritized and less critical patients receive delayed or even no care, the brain is believed to go through a similar process of memory triage. Recent salient memories are prioritized for consolidation, which helps create stable, long-term representations in the brain; less salient memories receive a lower priority, and are eventually forgotten if not sufficiently consolidated (Stickgold and Walker in Nat Neurosci 16(2):139–145, 2013). While rodents are a primary model for studying memory consolidation, common behavioral tests typically rely on a limited number of items or contexts, well within the memory capacity of the subject. A memory test allowing us to exceed an animal’s memory capacity is key to investigating how memories are selectively strengthened or forgotten. Here we report a new serial novel object recognition task designed to measure memory capacity and prioritization, which we test and validate using female mice.
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