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小兒大腦的解剖特点小兒的大腦在外观上与成人的大致相同,但与軀干的比重則远較成人的大。新生兒腦的重量是全身体重的1/8,例如小兒出生时的体重是3,200克,那么腦的重量就是400克;而成人腦重,則仅佔体重的1/40。新生兒的大腦上已有明显的溝廻形成,但較成人的淺,而且灰質層也較薄。在組織学方面,皮質細胞基本已經分層,但不够明显。苏联学者克拉梭夫斯基証明:人自生后直到老死,大腦皮層中的細胞数目不再增加,随年龄而变化的仅仅是細胞的分化及增大。因此成人与小兒腦的分区及溝廻等基本相同,所不同者只是細胞的大小、形狀及功能。皮質細胞的分化在胎生时期就已經开始了,在胎生末期及新生兒期达到了高潮,以后又
Pediatric Brain Anatomical Features Pediatric brains are roughly the same in appearance as adults, but their proportion to the trunk is far greater than that of adults. The weight of a newborn’s brain is one-eighth of its body weight. For example, when a child’s birth weight is 3,200 grams, the brain weight is 400 grams. Adult brain weight accounts for only 1/40 of the body weight. Neonatal brain has obvious ditch formation, but more shallow adult, but also the gray matter layer is also thin. In histology, cortical cells have basically stratified, but not obvious enough. Soviet scholars Kratovsky proved that: people from birth to old age, the number of cells in the cerebral cortex no longer increases, with age changes only the differentiation and increase of cells. Therefore, adult and pediatric brain partitions and ditch 迴 basically the same, the only difference is the size, shape and function of cells. The differentiation of cortical cells has started in the viviparous period, culminating in the end of birth and neonatal period, and later