한국인 소뇌에 관한 해부학적 및 통계학적 연구

Abstract

There hundred and twenty eight( '?187. ¥ 141) cerebella of Korean subjects were observed anatomically and stastically. Observed were the weight of the cerebellum, the transverse diameter of the cerebellum. the vertical and sagittal diameters of the vermis and the hemisphere, the transverse and sagittal diameters of the cerebellar peduncle, the width of the principal lobules of the vermis and the hemisphere, the depth of the interlobular fissures of the vermis and hemisphere, the length of the principal lobules of the hemisphere, the number of the cerebellar gyri of the vermis, the cortical thickness of the vermis, the size of the Purkinje cell and its nucleus, and the density of the Purkinje cells. The results obtained were as fallows: 1. The weight of the cerebellum increased very rapidly before 2-5 years of age, thereafter it increased slowly and reached the average weight of the adult at the age of 11-15 years. The weight ~of the male cerebellum was greater than that of the female. The ratio of the cerebellum weight to the brain weight increased until 2-5 years of age, thereafter it was constantClO% of the weight of the brain) throughout life. Sexual difference, were not observed. 2. The transverse diameter of the cerebellum, the vertical and sagittal diameters of the vernus, the vertical and sagittal diameters of the hemispheres increased very rapidly until 2-5 years of age, thereafter increased slowly. Completion of the development of the vermis and the hunispheres was at 6-10 years of age in the female and 11-15 years of age in the male. 98 The average diameters of the transverse, vertical and sagittal planes were 10 em, 5 em and 6 em respectively. Generally the male cerebellum was larger than the female one. 3. The transverse and sagittal diameters of the cerebellar .pedunde increased very rapidly until 2-5 years of age, thereafter increased slowly. Full development was reached at the age of 11-15 years. The two diameters were nearly the same, about 15 cm in the male ant measured slightly less in the female. 4. The principal lobules and the interlobular fissures developed very rapidly until 2--5 years of age, thereafter developed slowly and developed fully at the age of 11-15 years. 5. The number of the ceebellar gyri of the vermis was fairly constant, about 270, throughout life. 6. The thickness of the cerebellar cortex increased very rapidly until 2-5 years of age. thereafter increased slowly and developed fully at the age of 11-15 years. The cerebellar cortex was thickest at the top of the gyrus and thinnest at the bottom of the cerebellar sulcus. Sexual differences were not recognized. 7. The Purkinje cell and its nucleus developed fully at the age of 6-10 and 11-15 years. respectively. The Purkinje cells near the top of the gyrus and in the walls of the -cerebellar sulcus were long and those near the bottom of the sulcus were wide 8. The density of the Purkinje cells reached the adult mean value at the age of 11-15 years and was high near the top of the gyrus, low near the bottom of the sulcus.