한국인 대뇌의 상두정소엽(Brodmann 제7피질분야)의 세포구축학적 연구 보유

Abstract

This investigation is a study on the cytoarchitectonics of the crown of the cortex in the superior parietal lobule of 245 Korean brains (127 brains of the male, from the newborn to the age of 85, 118 brains of the female, from the newborn to the age of 61). The thickness of the total cortox and each cortical layer, the relative neuron density and the relative glia density in (100p)3 of each cortical layer and the relative total neuron and glia density 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 1. 883-2. 067mm. which was 80-87% of the adult cortex and increased very rapidly to 2.295-2.352 rnm, in the 2-5 year group which was 98-100 % of the adult, and thereafter it increased to the maximum thckness in the 11-15 year group and. then gradually decreased to the adult mean thickness in the 21-30 year group. The mean thickness of the adult cortex were 2.327mm in the male and 2.349mm. in the female without left-right difference. The thickness of the cortex increased gradually as the brain weight increased to 1100gms and it reached maximum value in the 1100-1199 gms. stage and thereafter it was relatively stable. 2. The highest mean neuron density in the 0-I'year group dropped rapidly to the adult mean value in the 6 -10 year group and following this there was no significant changes but after 60 years of age there was found the tendency of slight decrease. The mean neuron density of the adult cortex was 460. 3-482. 7. As the relationship between the neuron density and the brain weight, it was highest in 300-400 gms, stage of brain weight and decreased very rapidly to the adult