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采用免疫细胞化学技术ABC法，以引产死亡胎儿13例和死亡足月产新生儿4例为材料．对其树皮质Brodmann17区NPY样阳性结构进行了观察．发现新生儿视皮质NPY样阳性神经元主要位于灰-白质交界区和浅层白质内．NPY样阳性神经元为非锥体形神经元，以多极和双簇状神经元为主，还有部分双极和不成熟神经元．阳性神经元有大量的突起，在交界区和浅层白质内形成浓密的纤维网，而皮质层内种经纤维相当稀疏．发育学研究显示，胎龄22周已有阳性神经元出现，随着胎龄的增长，阳性神经元的密度、体积、突起的数量和长度不断增长，成熟神经元的比例也逐渐增加，阳性神经元逐渐向皮质迁移．
Using the ABC method of immunocytochemistry, 13 cases of fetal death induction and 4 cases of full-term neonatal death were used as materials. The NPY-like positive structure of Brodmann17 was observed in its cortex. Neonatal visual cortex NPY-like neurons found mainly in the gray-white matter junction and shallow white matter. NPY-like neurons are non-pyramidal neurons, mainly multipolar and double tufted neurons, and some bipolar and immature neurons. Positive neurons have a large number of protuberances, forming dense fibrous webs in the junctional area and in the superficial white matter, while the cortical layers are rather sparse. Developmental studies have shown that 22-week gestational age have positive neurons, with the increase of gestational age, positive neurons density, volume, the number and length of protrusions growing, the proportion of mature neurons also increased gradually, positive neurons Metamorphosis gradually migrated to the cortex.