한국인대뇌 각회부(Brodmann 제39피질분야) 뇌구벽부의 세포구축학적 연구

Abstract

This investigation is a study on the cytoarchitec一 tonics of the wall of the cerebral sulcus in the angular gyrus (Brodmann s arca of 39) of 152 Korean brains (86 of male, 66 of fcmale) from the newborns to the adults. The thickness of the total cortex and each cortical layer, the relative neuron density and the relative glia density in C100U) 3 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 thickness of the cortex in the 0-1 year group was 81% of the adult and it increased very rapidly during 2-5 years and it was thick as the adult cortex. In the 6-10 year groups it was maximum thick and thereafter it decreased gradually. The mean thickness of the cortex increased rapidly until the 700-800g stage of the brain weight and increased slowly until the 1. 1애- 1. 1999 stage of the brain weight and during this stage it was thick as the adult cortex. Thereafter it had a tenducy of slow increasing as the brain weight increased. 2, The relative neuron density was highest in the 0-1 year group and it decreased very rapidly in the 2-5 year group and it decreased slowly until the 11-15 year groups and at this time it is eaqual as the adult mean value. Thereafter it was relatively stable but it had a tendency to increase in old age. As the relation between the neuron density and the brain weight, it was highest in 300 많)()g stage of brain weight and it decreased rapidly until the brain weig ht was 500-700g stage and it drecreased slowly until the brain weight was 1. 1000-1.200g stage and in this stage it became eaqual as the adult mean value. Thereafter it had a tendevcy to decrea~e slowly as the brain weight increased. The mean value of the neuron density of the adult was 499-559. 3. The relative glia density was high in the 0-1 year group and it decreased rapidly in the 2-5 year group and was minimum value which was lower than the adult mean value, and thereafter it increased gradually as the age increased. The mean value of the relative glia density of the adult was 558-641 which is higher than that of the ad비t neuron density(4~뽕559). During the 300-500g stage of the brain weight the relative glia density was high and it decreased gradually to the minimum value (465-521) until the 1. 100- 1. 200g stage of the brain weight and thereafter it increased gradully as the brain weight increased. 4. The neuron density and glia density had no sexual defference and left-right lifference.