288-运动皮层神经元的功能与连接组织 episode artwork

EPISODE · Dec 3, 2025 · 18 MIN

288-运动皮层神经元的功能与连接组织

from 聊聊Sci

这篇文章研究了小鼠在执行多向舔食奖励的自然行为时,运动皮层神经活动与连接性之间的关系。作者们使用全光方法,结合双光子成像和光遗传学刺激,在完整大脑中绘制了运动皮层(ALM)第2/3层兴奋性神经元之间的因果连接。研究发现,ALM神经元编码了目标位置和奖励结果,并且功能相似的神经元在空间上呈柱状结构聚集,在局部(<100微米)表现出同类相连的兴奋性连接。此外,网络连接性呈现异质性,存在少数连接高度密集的“枢纽神经元”,这些枢纽神经元虽然对目标位置的调谐较弱,但对局部网络活动具有更强的协调作用,暗示了其在快速学习复杂目标导向行为中可能扮演的角色。References: Finkelstein A, Daie K, Rózsa M, et al. Connectivity underlying motor cortex activity during goal-directed behaviour[J]. Nature, 2025: 1-7.前往小宇宙评论区与主播互动

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288-运动皮层神经元的功能与连接组织

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