Vol 61, No 1 (2002)
Original article
Published online: 2001-11-19
The morphological types of neurones of the medial and lateral mamillary nuclei in a newborn guinea pig: Nissl, Klüver-Barrea and Golgi studies
Folia Morphol 2002;61(1):21-51.
Abstract
The studies were carried out on the hypothalamus of 5 newborn (P0 stage) guinea
pigs. The sections were impregnated according to three modifications of the Golgi
technique or stained according to the Nissl and Klüver-Barrera methods. On the
basis of the shape and size of perikarya, dendroarchitecture, pattern of axon
as well as the inner structure of neurones, in the medial (Mm) and lateral (Ml)
mamillary nuclei four morphological types of nerve cells were distinguished: cap-like
with two subtypes (33% of the cell population), fusiform (35%), triangular (12%)
and rounded unidendritic (21%) neurones. The majority of them possessed spines
on their dendrites. The spiny cells, both cap-like and fusiform ones, were observed
preponderantly, in the medial mamillary nucleus, whereas in the lateral mamillary
nucleus there were mainly seen the triangular and fusiform neurones, either spiny
or aspiny cells. The spineless rounded unidendritic cells were dispersed throughout
the mamillary region, but they were twice as numerous in Mm as in Ml, where they
were the least numerous.
Keywords: medial mamillary nucleuslateral mamillary nucleustypes of neuronesNissl and Klüver-Barrera methodsGolgi impregnationnewborn guinea pig
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