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将人类干细胞置入培养体系，施以恰当的分子信号诱导，不久后培养基中便可能浮现出仿生大脑皮质或小脑的雏形。这些直径通常仅数毫米的神经类或者说脑类器官，虽非如某些媒体所渲染的“缸中之脑”，却正以日益精密的方式逼真再现大脑的细胞组织与结构复杂性。长期关注该领域研究与舆论的加州大学圣地亚哥分校社会学家John Evans指出：“该领域在过去一年取得了如此显著的进展，这着实引人瞩目。”

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（图片来源：《Science》）

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