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The cytoarchitectonic and neuronal structure of the red nucleus in guinea pig: Nissl and Golgi studies

100%

Robak A., Szteyn S., Bogus-Nowakowska K., Doboszynska T., Rowniak M.

Folia Morphologica

2000

tom 59

nr 4

The present studies were carried out on the brains of adult guinea pigs, DunkinHartley strain. On the basis of preparations, they were stained according to the Nissl and the Klüver-Barrera method’s; a short description of the cytoarchitectonics and the characteristics of the rubral cells were written. The red nucleus (RN) of the guinea pig is 1.2 mm in length. Three cellular parts in RN, and three classes (A, B, C) of the rubral cells were distinguished. Taking into consideration the predominant cell size, RN was divided into magnocellular part (RNm), parvocellular part (RNp) and intermediate part (RNi). On the basis of Golgi impregnated preparations four neuronal types (I, II, III, IV) were distinguished. To sum up, in the guinea pig were observed: the large, mainly multipolar (type I) and bipolar (type II) spiny being coarse (class A) in Nissl material; the medium-sized, triangular, aspiny (type III) corresponding to the fine cells (class B); and the small, both spiny and aspiny neurons (type IV), which are the fine or achromatic cells (classes B or C) in Nissl stained slices. The highest degree of dendritic branching was observed in type I, whereas the lowest in cells of types III and IV.

The neuronal structure of the red nucleus in newborn guinea pigs

84%

Robak A., Szteyn S., Bogus-Nowakowska K., Rowniak M.

Folia Morphologica

2003

tom 62

nr 1

The preparations, stained according to the Nissl and Klüver-Barrera methods, were used to describe the topography and morphology of the red nucleus (RN) as well as the structure of the rubral perikarya in newborn (P0) guinea pigs. The Golgi impregnated preparations were used to distinguish types of neurons. RN is a uniform cell group and has the length from 740 to 860 µm. The Nissl stained perikarya were classified into three categories: big, medium-sized and small (A, B, C, respectively). The big perikarya, which contain a lot of tigroidal substance, were mainly observed at the caudal and ventral portions of RN. The small perikarya often have multiple nucleoli. The impregnated neurons were classified into 5 types: 1 — large, aspiny, rich-arborised multipolar cells, 2 — large and medium sized, spiny, rich-arborised fusiform or pear-shaped cells, 3 — medium-sized, spiny, rich-arborised rounded cells, 4 — medium-sized, spiny, richarborised bipolar cells, 5 — small and single medium-sized cells. The 5th type constitutes a heterogeneous population and also has neurons in different developmental stages. Intraspecies variations concerning both the length of RN and a number of the triangular perikarya of the red nucleus were observed in the examined guinea pigs.

Ograniczanie wyników

2 Folia Morphologica

2 Bogus-Nowakowska K.

2 Robak A.

2 Rowniak M.

2 Szteyn S.

1 Doboszynska T.

1 2003

1 2000

Wyniki wyszukiwania

The cytoarchitectonic and neuronal structure of the red nucleus in guinea pig: Nissl and Golgi studies

The neuronal structure of the red nucleus in newborn guinea pigs