[Quantitative growth analysis of limbic nuclei areas fresh volume in diencephalon and mesencephalon of an albino mouse ontogenic series. II. Corpus mammillare].

The fresh volumes of the Nucl. medialis and of the Nucl. lateralis corporis mammillaris of 52 white mice aged between 17 and 60 days of ontogenesis have been determined. The fresh volume of the left Nucl. lateralis is significantly larger than that of the right side. The data of the Nucl. laterales have been fitted by a 3parametric logistic function. The data of the Nucl. medialis have been fitted by a sum of logistic functions. This sum has an increasing and a decreasing component and it shows a maximum of the sum of both components near 32 days of ontogenesis. The degree of maturity and the growth-rate of maturity have been discussed. Both nuclei belong to the group of brain regions in white mice with an early development. The growth of different brain regions is asynchronous. There is a need for further quantitative analyses.