Principles: -‐ Vascular development follows: -‐ metabolic demand -‐ cerebral morphology -‐ Organiza1on of vascular distribu=ng system evolves as the brain grows -‐ open neural tube: diffusion from amnio=c fluid -‐ prechoroidal stage : neural tube closes, diffusion from meninx primi1va -‐ choroidal stage : invagina = of meninx!脉络丛;外部和室室表面的差异;基本动脉桃子一直存在于以后的阶段 - 实质阶段:脑幔厚:超级血管系统的血管生成
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