title: [Morphometric analysis of the inner skull base and the brain stem on median frozen sections of the fetal head, between 14 and 40 weeks of gestational age].
abstract: 1. In median sections through frozen heads of 75 human fetuses, between 14 and 40 weeks of age, a total of 12 finite lines was determined at the inner skull-base, at the brain-stem, and in relation of the brain-stem to the inner skull-base. The fetuses were classified into 5 age groups. The data were obtained by means of variance analysis. 2. So far there has not been any information on human fetuses and measured quantities in the available literature. Comparing the mean values of the finite lines of the above mentioned five age groups explains something about the increase of growth. 3. In evaluating the results obtained and comparing the qualitative data reported in the literature, the importance of the different development of medullary functional units on the one hand and the topographic changes in the sense of additive processes on the other hand is emphasized. 4. The comparatively larger increase in the standard deviations between the 29th and the 40th week of fetal age suggests the tendency towards a plateau that may be due to the full development of microstructural systems in the fields examined.
mesh_terms: D001933:Brain Stem / Q000196:embryology*; D002508:Cephalometry; D005629:Frozen Sections; D005865:Gestational Age; D006801:Humans; D012886:Skull / Q000196:embryology*
vernacular_title: Beitrag zur morphometrischen Analyse der inneren Schädelbasis und des Hirnstammes an mediannah gefriergeschnittenen Köpfen von Feten im Alter zwischen 14 und 40 Wochen.