한국인 태아의 뇌회 형성에 관한 형태학적 연구

Abstract

To evaluate the development of the convolutional pattern of the cerebral hemispheres a total of 123 brains of Korean fetuses of gestation ages ranging from 12 to 44 weeks was studied. The fetuses were products of artificial ahortions, and were proved to be normal after complete examination of fetuses and placentas. The brains were removed as soon as pos . sible after delivery, and were fixed in 10% formalin for one week before being examined for this study. It was quite consistent feature that gyral development started to appear from 20 weeks gestation age around the Sylvian fissure. The sequential develop· mental changes of the individual fissures, sulci and gyri of cerebral hemispheres throughout the gestational period are tabulated. It was concluded that the pattern of gyral development of Korean fetuses is comparable to that of other countries, and could be used as a parameter of maturation in the developing brains.