인태아대뇌 도 회백질의 발육 및 세포구축학적 연구

Abstract

Quantitative changes have been investigated on the prenatal development of human fetal brain with special reference to the growth and cytoarchitectonics in insular cortex from 112 Korean fetuses(60 of male and 52 of female) of which the age ranged from 5th fetal month to the end of the fetal life. 1. Of the insular cortical thickness at 5th month of the fetal age O. 6mm was increased in proportion to increase of fetal month into 1. 7mm at the end of fetal life. 0.6mm of the cortical thickness in the group of less than 50gm of brain weight was repidly increased until that of the group of 151~200gm， and was reached to 1. 6mm in the group of more than 401gm of brain weight 2. The absolute cortical cell densities were brought progressively into low by way of turning points at age of 5th and 9th of fetal month, and at 101~150 gm and 301~350gm of the brain weight 3. Differentiation of the insular cortical lamination was completed within at both 6th month of the fetal age and the step of 51~IOOgm of the brain weight 4. None of the sexual difference was found in the cortical thickness and in both the relative and absolute cell densities