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婴儿能编码短暂的海马体记忆

2025-03-21 13:49 by 图夫航行记

一项功能性磁共振成像(fMRI)研究挑战了有关婴儿记忆的假设;研究人员报告称,婴儿在 12 个月大的时候能够编码记忆。研究结果表明,婴儿期遗忘(即人们无法记住生命最初几年的情况)更可能是由记忆检索失败所致,而非因为一开始就无法形成记忆。尽管婴儿期为快速学习的阶段,但这一时期形成的记忆并不会持续到童年后期或成年期。人类通常无法回忆起生命最初三年的事件——这种现象被称为婴儿期遗忘。成年人为何对婴儿时期的情景记忆会有历时数年的空白仍然成谜。有一种学说认为,这是因为海马体(这是一个对情景记忆至关重要的脑区)在婴儿期尚未发育完全。然而,在啮齿动物中所做的研究挑战了这一观点;这些研究显示:记忆痕迹或印迹会在婴儿的海马体中形成,但这些印迹会随着时间的推移而变得无法获取。研究人员用 fMRI 对在完成记忆任务时的 4 至 25 个月的婴幼儿进行了脑部扫描。研究结果表明,婴儿的海马体从 1 岁左右开始就能对个人经历的记忆进行编码,从而为个体记忆形成于婴儿期提供了证据。

DOI 10.1126/science.adt7570
eurekalert:婴儿能够编码短暂的海马体记忆

#科学



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婴儿能编码短暂的海马体记忆

2025-03-21 13:49 by 图夫航行记

一项功能性磁共振成像(fMRI)研究挑战了有关婴儿记忆的假设;研究人员报告称,婴儿在 12 个月大的时候能够编码记忆。研究结果表明,婴儿期遗忘(即人们无法记住生命最初几年的情况)更可能是由记忆检索失败所致,而非因为一开始就无法形成记忆。尽管婴儿期为快速学习的阶段,但这一时期形成的记忆并不会持续到童年后期或成年期。人类通常无法回忆起生命最初三年的事件——这种现象被称为婴儿期遗忘。成年人为何对婴儿时期的情景记忆会有历时数年的空白仍然成谜。有一种学说认为,这是因为海马体(这是一个对情景记忆至关重要的脑区)在婴儿期尚未发育完全。然而,在啮齿动物中所做的研究挑战了这一观点;这些研究显示:记忆痕迹或印迹会在婴儿的海马体中形成,但这些印迹会随着时间的推移而变得无法获取。研究人员用 fMRI 对在完成记忆任务时的 4 至 25 个月的婴幼儿进行了脑部扫描。研究结果表明,婴儿的海马体从 1 岁左右开始就能对个人经历的记忆进行编码,从而为个体记忆形成于婴儿期提供了证据。

DOI 10.1126/science.adt7570
eurekalert:婴儿能够编码短暂的海马体记忆

#科学

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