日本理化研究所人员和庆应大学医学系的同行发现,一种名为“Cdk5”的酶是大脑皮质完全发育所不可缺少的物质。新闻公报说,掌管记忆和思考等高级脑功能的大脑皮质,在正常情况下由6层组成。在子宫中,哺乳动物幼体的大脑皮质神经细胞,起初会在最靠近脑室的地方由内向外增殖,大脑皮质因此得以发育。如果这种神经细胞向外增殖发生异常,就 Japanese physico-chemical researchers and colleagues from Keio University’s medical department found that an enzyme called “Cdk5” is an indispensable substance for the complete development of the cerebral cortex. The press communiqué said that the cerebral cortex, which controls advanced brain functions such as memory and thinking, normally consists of six layers. In the womb, cerebral cortical neurons of mammalian larvae initially proliferate from the inside to the outside near the ventricles, whereupon the cerebral cortex develops. If this nerve cell proliferation abnormalities occur, it