摘要 在本期播客中，主持人Feiyang将带着我们和好奇的朋友抹茶旦旦一起，深入探索一个微小却强大的大脑结构——伏隔核（nucleus accumbens）。这个被称为“大脑快乐按钮”的区域，是奖赏、动机和行为驱动力的核心。本期内容结合了Olds和Milner的经典电刺激实验以及Knutson等人对人类期待奖赏的fMRI研究，揭示了伏隔核如何在我们获得奖励，甚至仅仅在期待奖励时就被激活。我们将了解大脑是如何构建起“正反馈循环”：你越觉得一件事有成就感，就越想重复它——无论是复习考试还是玩游戏。但也正因如此，奖赏系统也可能被“劫持”，让我们陷入短期快感的瘾性循环。播客最后，Feiyang也分享了如何通过正念冥想和长期目标设定来训练大脑，重建健康的奖赏机制。 时间线： 00:00 引入 00:46 伏隔核的位置和作用 01:33 Olds和Milner 的经典实验 02:44 Knutson et al的fMRI实验 04:08 奖励系统一定让我们变得更好吗 05:45 伏隔核受损怎么办 06:20 神经可塑性可以缓解伏隔核的损伤 06:53 启示 参考文献 Knutson, B.,Adams, C. M., Fong, G. W., & Hommer, D. (2001). Anticipation of increasingmonetary reward selectively recruits nucleus accumbens. The Journal ofneuroscience, 21(16), RC159. Olds, J., &Milner, P. (1954). Positive reinforcement produced by electrical stimulation ofseptal area and other regions of rat brain. Journal of comparative andphysiological psychology, 47(6), 419.

Abstract: This episode, using Matcha Dandan as the main character, explores the role of the nucleus accumbens — a tiny structure at the heart of your brain's reward system. Through classic experiments by Olds & Milner and modern fMRI research by Knutson et al., listeners discover how the brain forms positive feedback loops — and how those loops can either build healthy habits or trap us in cycles of instant gratification. The episode closes with tips on strengthening this system through mindfulness and long-term goal-setting. Timeline: 00:00 Introduction 00:52 Where and What Is the Nucleus Accumbens 01:40 How Scientists Discovered the Reward System? (Olds & Milner) 02:25 Is It Only About Rats? (Knutson et al.) 05:00 Does Nucleus Accumbens Help or Hurt us? 06:10 What Happens if it is Damaged? 06:37 How Can We Strengthen It? 07:25 Final Takeaways Reference: Knutson, B.,Adams, C. M., Fong, G. W., & Hommer, D. (2001). Anticipation of increasingmonetary reward selectively recruits nucleus accumbens. The Journal ofneuroscience, 21(16), RC159. Olds, J., &Milner, P. (1954). Positive reinforcement produced by electrical stimulation ofseptal area and other regions of rat brain. Journal of comparative andphysiological psychology, 47(6), 419.