한국인대뇌 각회부(Brodmann 제39피질분야) 피질의 세포구축학적연구 보유

Abstract

This investigation is a study on the cytoarchitectonics of the gyrus top in the angular gyrus (Brodmann' s area of 39) of 152 Korean brains (86 brains of male from the newborn to the age of 85. 66 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 glia density in (lOOp)' of each cortical layer and the relative total neuron and glia densities of the cortex were observed and the results were summerized as follows: 1. The mean cortical thickness in the 0-1 year group was 81. 6% of the adult cortical thickness and it increased to the adult mean thickness in the 2-5 year group. In the 6-10 year group it was the maximum thickness and thereafter decreased gradually. The mean cortical thickness of the adult was 2. 44 mm. The mean cortical thickness increased rapidly until the 700 -899g stage of the brain weight and thereafter it increased gradually. 2. The relative neuron density was highest in the 0-1 year group and decreased rapidly in the 2-5 year group which was about half number of that of the 0-1 year group. Also it decreared gradually until 16-20 age group and thereafater it had a tendency to increase in old ages. The mean neuron density of the asult cortex was 485-517. As the relationship between the relative neuron density and the brain weight, it was highest in 300499gms stage of the brain weght and decreased rapidly in the 500~699gms stage and thereafter it deceased - 21- gradually. 3. The relative glia density was relatively high(515 ~619) in the 0~1 year group and decreased to the minimum value (359~415) in 2~5 year group and thereafter increased gradually, which was highest(600 ~635) in over 61 year age group. The mean value of the glia density of the adult was 524~565. As the relationship between the relative glia density and the brain weight, it decreared gradully in 1. 100~1. 199 gms stage of brain weight and thereafter it increased slowly. 4. The neuron density and glia density had no sexual difference and left-right difference.