title: The types of neurons of the somatic oculomotor nucleus in the European bison. Nissl and Golgi studies.
abstract: The neuronal structure of the somatic oculomotor nucleus (SON) was studied on the basis of Nissl and Golgi preparations, obtained from mesencephalons of 4 European bisons. We distinguished four types of neurons in the investigated nucleus: 1. The large multipolar nerve cells with 5-8 thick dendritic trunks and a thin axon which emerges directly from the soma. These are the most numerous neurons in the SON. 2. The small multipolar neurons. These cells have 4-6 thick dendritic trunks. An axon arises mostly from initial segment of one of the dendrites. This type represents about 8% neurons of SON. 3. The triangular neurons. From perikaryon 3 thick dendritic trunks emerge. A thin axon arises directly from the cell body. These cells make about 10% neurons of SON. 4. The pear-shaped cells which have 1 or 2 dendritic trunks concentrate at one pole of the neurons. In the SON there are about 2% pear-shaped cells. Their features correspond to the features attributed by many authors to the interneurons.
authors.affiliation: Department of Vertebrate Anatomy, University Pedagogical School, Olsztyn.
authors.forename: S
authors.initials: S
authors.lastname: Szteyn
authors.forename: A
authors.initials: A
authors.lastname: Robak
authors.forename: M
authors.initials: M
authors.lastname: Równiak
mesh_terms: D000818:Animals; D016164:Bison / Q000033:anatomy & histology*; D008636:Mesencephalon / Q000648:ultrastructure*; D009474:Neurons / Q000648:ultrastructure*; D009802:Oculomotor Nerve / Q000648:ultrastructure*; D013194:Staining and Labeling / Q000379:methods*