1508-后顶叶与运动皮层的分级动作编码 episode artwork

EPISODE · Aug 29, 2026 · 22 MIN

1508-后顶叶与运动皮层的分级动作编码

from 聊聊Sci

这项研究通过对两名截瘫患者的大脑运动皮层(MC)和后顶叶皮层(SPL)进行单神经元记录,揭示了人类在意图执行与观察他人动作时大脑编码的差异。研究发现,SPL 能够以一种跨形式的稳定方式同时处理意图和观察到的动作,即在观察和执行时使用共享代码。相比之下,MC 的活动则主要受意图驱动,其对观察到的动作编码非常微弱且具有选择性。通过任务切换实验进一步证明,SPL 具有一种上下文相关的门控机制,仅在观察到的信息与行为目标相关时才进行灵活编码。这种等级化的组织架构表明,大脑并非简单地通过自动的“镜像”机制来理解他人,而是依赖于后顶叶皮层根据任务需求动态地将视觉输入与内部目标相结合。这项发现挑战了传统的镜像神经元理论,为人类如何灵活理解复杂的社会行为提供了新的神经生理学证据。References:Bougou V, Gamez J, Rosario E R, et al. Hierarchical and Context-Dependent Encoding of Actions in Human Posterior Parietal and Motor Cortex[J]. bioRxiv, 2025.前往小宇宙评论区与主播互动

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1508-后顶叶与运动皮层的分级动作编码

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