神经表示的时间不对称性预测了记忆决策
Zhifang Ye1, Yufei Zhao1, Emily J Allen2
1Department of Psychology, University of Oregon, Eugene, OR, USA.
bioRxiv : the preprint server for biology
|July 29, 2024
概括
大脑使用时间不对称性在神经上类似于过去与未来的事件,以做出记忆决策. 这种比较对于最近的经历和当真实的记忆很弱时是最强的.
科学领域:
- 认知神经科学 认知神经科学
- 神经成像是一种神经成像.
- 记忆研究 记忆研究
背景情况:
- 刺激的熟悉性可以来自最近的遭遇,与最近的经历相似,或典型的经历.
- 了解大脑如何处理这些相似性来源来做出记忆决策是一个关键的挑战.
研究的目的:
- 为了研究大脑如何计算不同时间窗口的神经相似性.
- 根据时间相似性确定记忆决策的神经基础.
主要方法:
- 功能磁共振成像 (fMRI) 用于测量大脑活动.
- 在当前刺激和过去/未来事件之间计算的神经相似性,跨越各种时间尺度 (秒到天).
- 行为记忆决策被记录在一个试验逐试验的基础上.
主要成果:
- 记忆决策是由神经相似性的时间不对称性 (过去和未来相似性之间的差异) 预测的.
- 这种时不对称的效应在侧面皮和皮皮层中观察到.
- 对于最近的过去事件 (分钟) 和当真实记忆力较弱时,这种效应最强.
结论:
- 大脑通过将实际的过去经历与预测的未来事件进行比较来支持记忆决策.
- 神经相似性的时间不对称性在区分旧刺激和新刺激方面发挥着至关重要的作用.
- 这种机制对于在不确定性条件下指导记忆判断尤其重要.
更多相关视频
相关概念视频
Storage
83
A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
83
Role of Hippocampus in Memory
202
The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
202
Lateralization
318
Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
318
Higher Mental Functions of Brain: Learning and Memory
718
Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or...
718


