인대뇌 연상회부(Brodmann 제40피질세포)의 세포 구축학적 연구 보유

Abstract

This investigation is a study on the cytoarchitectonics of the gyrus top in the supramarginal gyrus of 139 Korean brains (75 brains of the male, from the newborn to the age of 85, 64 brains of the female from the newborn to the age of 61). The thickness of the total cortex and each cortical layer, the relative neuron density and the relative glia density in 000 p.)3 of each cortcal layer and the relative total neuron and glia densities of the cortex were observed and the results were summarized as follows: 1) The mean thickness of the cortex in the 0-1 year group was 2.06-2. 15mm. which was 80.4% of the adult cortex thickness and increased to 2. 44-2. 50mm. in the 2-5 year group which was 94.7% of the adult and thereafter it increased to the mean thickness of the adult cortex in the 6-10 year group and thereafter it was relatiively stable. ThE: mean thickness of the adult cortex was 2. 613 mm. The thickness of the cortex increased gradually as the brain weight increased to 1. 400gms and thereafter it decreased. 2) The highest neuron d~ nsity in the 0-1 year group decreased rapidly to the adult mean value in the 16-20 year group and thereafter it was ielatively stable. The mean neuron density of the adult cortex was 520-534. As the relationship between the neuron density and brain weight, it was highest in 3OO-499gms stage of brain weight and decreased gradually to the adult mean value in the 1. 100-1. 199 grns stage and thereafter became stable. 3) The highest glia density was observed in the 0 -1 year group but it was lower than the neuron density in the same age group and it decreased very rapidly to the minimum value in the 2-5 year group and following this it gradually increased. In the 300499gms stage of the brain weight the mean glia density was highest and decreased rapidly to the minimum value in the 1. 100-1. 199 gms stage thereafter it increased gradually as the brain weight increased. 4) The neuron density and glia density had no sexual difference and left-right difference.