title: The neuronal structure of the red nucleus in newborn guinea pigs.
abstract: 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 microm. 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, rich-arborised 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.
authors.affiliation: Department of Comparative Anatomy, University of Warmia and Mazury, Olsztyn, Poland. ankar@matman.uwm.edu.pl
authors.forename: Anna
authors.initials: A
authors.lastname: Robak
authors.forename: Stanisław
authors.initials: S
authors.lastname: Szteyn
authors.forename: Krystyna
authors.initials: K
authors.lastname: Bogus-Nowakowska
authors.forename: Maciej
authors.initials: M
authors.lastname: Równiak
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D048429:Cell Size; D006168:Guinea Pigs / Q000033:anatomy & histology*; D016591:Histocytological Preparation Techniques; D006801:Humans; D009474:Neurons / Q000166:cytology* / Q000378:metabolism; D012012:Red Nucleus / Q000166:cytology*