even small differences in the timing and duration of the genesis of neural cells and changes in the composition and the ratios of cell proliferation and programmed cell death in the transient embryonic zones of the developing forebrain can be responsible for the evolutionary expansion of the neocortex and the concomitant appearance of novel functions in cognitive processing of information (Bystron, Blakemore, & Rakic, 2008). Although genetically humans are surprisingly similar to other mammals, the uniqueness of the human cognitive potential, which is an output of corti- cal function, must have some genetic basis. Since the molec- ular structure and function of neurotransmitters, receptors, and ion channels do not change substantially over the phy- logenetic scale, the secret to the success of Homo sapiens is probably mainly due to an increased number of neurons, more elaborated connections, functional specialization, and introduction of new cortical areas.
读完了新生儿期,总结一下
出生后的皮层在层级结构上还是非常不成熟的,而其中前额叶在细胞结构上也很不成熟。皮质第iiic层没有锥体束磁性这点让我想到了健康评估学过的巴宾斯基征,会在新生儿以及锥体束受损的成年人中出现。显然就是因为新生儿还没有发育好锥体束(第iiic层而言)。当时不明白什么是锥体束所以没想到(…)。皮质第v层此时锥体神经元比第iiic层要大要复杂,不过它们都开始脊椎生成(spinogenesis)以及基础树突发育。
值得注意的fun facts是短的皮层间通路发育不是主要呈现在前额叶而是在视皮层。是不是因为这个时候偶尔会睁眼所以比孕期有更多的…学习资料(。如果对新生儿进行视觉剥夺实验会怎么样呢?(牙白
@BurnInAGoodWay 树突棘生成