open access

Vol 61, No 1 (2002)
ORIGINAL ARTICLES
Published online: 2001-11-19
Submitted: 2012-02-06
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The morphological types of neurones of the medial and lateral mamillary nuclei in a newborn guinea pig: Nissl, Klüver-Barrea and Golgi studies

Anna Robak
Folia Morphol 2002;61(1):21-51.

open access

Vol 61, No 1 (2002)
ORIGINAL ARTICLES
Published online: 2001-11-19
Submitted: 2012-02-06

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.

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.
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Keywords

medial mamillary nucleus; lateral mamillary nucleus; types of neurones; Nissl and Klüver-Barrera methods; Golgi impregnation; newborn guinea pig

About this article
Title

The morphological types of neurones of the medial and lateral mamillary nuclei in a newborn guinea pig: Nissl, Klüver-Barrea and Golgi studies

Journal

Folia Morphologica

Issue

Vol 61, No 1 (2002)

Pages

21-51

Published online

2001-11-19

Bibliographic record

Folia Morphol 2002;61(1):21-51.

Keywords

medial mamillary nucleus
lateral mamillary nucleus
types of neurones
Nissl and Klüver-Barrera methods
Golgi impregnation
newborn guinea pig

Authors

Anna Robak

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