默认模式的网络连接预测了长期遗忘的个体差异:存储退化证据,而不是检索失败的证据
Yinan Xu1, Chantel S Prat1,2, Florian Sense3,4
1Department of Psychology, University of Washington, Seattle, Washinton, United States of America.
PLoS computational biology
|September 12, 2025
概括
了解我们如何忘记是记忆研究的关键. 这项研究将个人遗忘速度与大脑连接模式联系起来,表明默认模式网络积极维护记忆,防止存储退化.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 计算神经科学是一种神经科学.
背景情况:
- 声明性记忆维护和遗忘机制仍然不太了解.
- 测量记忆色率及其神经相关物是经验上具有挑战性的.
- 现有的研究缺乏对记忆衰竭的基础真相测量.
研究的目的:
- 为了研究记忆忘记速度的个体差异的神经相关性.
- 将功能性大脑连接模式与长期记忆 (LTM) 遗忘的行为测量联系起来.
- 探索默认模式网络 (DMN) 在内存维护中的作用.
主要方法:
- 计算表型化用于从准确性和响应时间数据中估计个体遗忘速度.
- 对33名参与者进行了自适应对联学习任务.
- 应用机器学习到静态fMRI连接数据,将其与个人遗忘速度相关联.
主要成果:
- 在LTM中的个人遗忘速度与静止状态的功能连接有显著的关联.
- 默认模式网络 (DMN) 内的连接模式以及DMN和感觉区域之间的连接模式预测了忘记速度.
- 使用连接模式单独实现了高预测准确度 (r = 0.77).
结论:
- 休息状态连接,特别是在DMN内和连接到DMN,在记忆维护中起着至关重要的作用.
- 这些发现支持储存降解假设的遗忘.
- 脑膜膜网和相关的感官区域积极参与预防记忆衰退.
更多相关视频
09:39Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation
Published on: June 26, 2013
27.7K
07:25Simultaneous Monitoring of Wireless Electrophysiology and Memory Behavioral Test as a Tool to Study Hippocampal Neurogenesis
Published on: August 20, 2020
4.1K
相关概念视频
Interference and Decay
423
Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations.
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
423
Forgetting
375
Forgetting is an intrinsic aspect of human memory, characterized by the gradual loss or inaccessibility of information over time. Hermann Ebbinghaus, a pioneering psychologist, extensively studied this phenomenon and formulated the forgetting curve. This curve illustrates that memory loss occurs rapidly immediately after learning and then decelerates over time. Several mechanisms contribute to forgetting, including encoding failure, storage decay, retrieval failure, and interference.
Encoding...
Encoding...
375
Long-term Depression
33.2K
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
33.2K
Long-term Depression
3.1K
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Calcium Ion Concentration Mechanism
If over...
Calcium Ion Concentration Mechanism
If over...
3.1K
Storage
365
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...
365
Higher Mental Functions of Brain: Learning and Memory
1.9K
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...
1.9K
