인태아대서 후횡측두회 Brodmann 제42피질분야 피질의 발육 및 세포구축학적 연구

Abstract

Quantitative changes have been investigated on the prenatal development of the human fetal brain with special reference to the growth and cytoarchi· tectonics in the cortex of posterior transverse temporal gyrus(Brodmann's area 42) from 115 korean fetuses(of them, 61 of male and 54 of female) of which the age ranged from 5th fetal month to the end of the fetal life. 1. Of the cortical thickness at 5th month O.7mm was increased in proportion to increase of fetal month to 1.6mm at the end of fetal life. O. 7mm of the thickness in the group of less than 50gm of brain weight was increased into 1. 7mm in group of more than 401gm of the brain weight. 2. Of the absolute cortical cell density the hig· her values observed at 6th and 7th month of fetal age, and 51~100gm and 101~150gm of the brain weight groups were decreased with gain of the age and the weight. 3. Differentiation of the cortical lamination was completed within 6th month of the fetal age of the stage of 101~150gm of the brain weight. 4. None of the sexual difference was found in thickness, relative and absolute cell densities of the cortex.