多巴胺类过程预测事件记忆中的时间扭曲.
Erin Morrow1, Ringo Huang1, David Clewett2
1Department of Psychology, University of California, Los Angeles, CA, USA.
Nature communications
|March 15, 2026
概括
我们的记忆会扭曲时间,根据经验延伸或压缩时间. 多巴胺系统的激活,特别是在腹膜区域 (VTA),影响这些记忆时间扭曲,特别是在事件边界周围.
科学领域:
- 认知神经科学 认知神经科学
- 神经生物学 神经生物学 神经生物学
背景情况:
- 记忆回忆不是一个完美的时间记录;它涉及主观扭曲.
- 多巴胺基系统在记忆编码和时间感知中起着至关重要的作用.
研究的目的:
- 为了调查多巴胺基系统的激活是否扩大了不同事件之间的记忆时间表示.
- 探索事件边界,多巴胺活性和记忆中的时间感知之间的关系.
主要方法:
- 功能性磁共振成像 (fMRI) 与眼睛跟踪相结合.
- 参与者编码了项目序列,同时暴露在听觉音调中,偶尔会产生边界创建的变化.
- 测量了腹膜面积 (VTA) 激活和闪的模式.
主要成果:
- 音调开关显著激活了VTA,响应大小与时间扩张相关.
- 闪的增加预测了更大的记忆时间扩展,特别是跨越事件边界的项目.
- 多巴胺活性与围绕突出事件的主观时间扩展有关.
结论:
- 多巴胺类过程对事件结构敏感,影响记忆扭曲.
- 这些扭曲可能有助于将连续经验细分为离散的情节性记忆.
- 这些发现突出了多巴胺系统在塑造我们过去时间的主观经验中的作用.
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