인 대뇌 상측 두회 (Brodmann 제22피질 분야) 피질의 세포 구축 학적 연구보유

Abstract

This investigation is a study on the cytoarchitectonics of the cortex in superior gyrus (Brodmann's area 22) of the 146 Korean brains, male 84 and female 62, from newborn to adult. The thickness, relative neuron density and realtive glia density of the cerebral cortex were observed in relation with the increment of the age and brain weight, and the results obtained were summarized as follows: 1. The cortical thickness increased rapidly upto the 2-5 year-group, then showed slow increase to the highest value of the 11-15 year-group, and thereafter decreased gradually. The thickness of the cortex in relation with the brain weight showed relatively rapid increase to reach the value of the group of 1, 100-1, 1999m in brain weight which was similar to that of the adult, and slow irregular increment thereafter. 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 value of that of the former. It also decreased gradually until the 16-20 year-group showing the density similar to that of the adult. In relation with the brain weight, the highest density was found in the group of the 300-499gm in brain weight. The density showed relatively rapid decrease until the group of 900"..,1, 099gm in brain weight, and then slow decreasing tendency thereafter. 3. The 0-1 year-group showed relatively high density and it decreased to the minimum in the 2-5 year-group and then increased gradually until it reached over the value of the 0-1 year-group. As for the relation between the relative glia density and the brain weight, it decreased gradually until the group of 1, 100-1, 1999m in brain weight, and then it showed gradual increase. 4. The data showed above seemed not to have any sexual and left-right differences.