School of Psychological Sciences, Tel-Aviv University, Tel-Aviv, Israel.
Sagol School of Neuroscience, Tel-Aviv University, Tel-Aviv, Israel.
Nat Rev Neurosci. 2021 Mar;22(3):181-192. doi: 10.1038/s41583-020-00420-w. Epub 2021 Jan 22.
The default mode network (DMN) is classically considered an 'intrinsic' system, specializing in internally oriented cognitive processes such as daydreaming, reminiscing and future planning. In this Perspective, we suggest that the DMN is an active and dynamic 'sense-making' network that integrates incoming extrinsic information with prior intrinsic information to form rich, context-dependent models of situations as they unfold over time. We review studies that relied on naturalistic stimuli, such as stories and movies, to demonstrate how an individual's DMN neural responses are influenced both by external information accumulated as events unfold over time and by the individual's idiosyncratic past memories and knowledge. The integration of extrinsic and intrinsic information over long timescales provides a space for negotiating a shared neural code, which is necessary for establishing shared meaning, shared communication tools, shared narratives and, above all, shared communities and social networks.
默认模式网络（DMN）通常被认为是一个“内在”系统，专门从事内部导向的认知过程，如白日梦、怀旧和未来规划。在这个观点中，我们认为 DMN 是一个活跃和动态的“感知”网络，它将外部信息与先前的内在信息整合在一起，形成随着时间推移而展开的丰富的、依赖上下文的情境模型。我们回顾了依赖自然刺激（如故事和电影）的研究，这些研究表明，个体的 DMN 神经反应不仅受到随着时间推移积累的外部信息的影响，还受到个体独特的过去记忆和知识的影响。长时间尺度上的外在和内在信息的整合为协商共享神经编码提供了空间，这对于建立共享意义、共享通信工具、共享叙述以及最重要的是，共享社区和社交网络是必要的。
