Szteyn S, Robak A
Department of Vertebrates Anatomy, Teachers Training College, Olsztyn, Poland.
J Hirnforsch. 1989;30(5):577-81.
The study was carried out on the medullae oblongatae of four European bisons. Preparations were made according to the Nissl, Klüver-Barrera and Golgi methods. Nucleus gracilis and nucleus cuneatus of the European bison are formed of 4 types of neurons. Type I--triangular cells. The perikaryon issues 3 dendrites bifurcating once or twice. The dendritic field is ball-shaped. A single thin axon emerges directly from the soma. Tiny granules of the tigroidal substance are very densely distributed and penetrate into the initial segments of dendrites. Type II--multipolar cells. These neurons have 7-9 thick dendrites which bifurcate twice. The dendritic field is ball-shaped. A single axon, 2 microns thick, emerges directly from the perikaryon. The cells contain thick spherical granules of the tigroidal substance. Type III--fusiform cells. From both poles of the perikaryon 2-3 thick dendrites originate which first bifurcate and next give off 2-3 branches. At each pole of the cell there is a separate dendritic field having a stream-like form. The axon arises from the lateral surface of the perikaryon. The tigroidal substance has a form of elongate bands. Type IV--rounded cells. Three thick dendrites are concentrated at one pole of the cell. The dendrites give off collaterals and ramify. The dendritic field has a stream-like form. The axon emerges from the perikaryon, a long distance from the dendrites. Thick granules of the tigroidal substance are evenly distributed in the cell.
该研究在四只欧洲野牛的延髓上进行。按照尼氏法、克吕弗-巴雷拉法和高尔基法制作标本。欧洲野牛的薄束核和楔束核由4种类型的神经元组成。I型——三角形细胞。胞体发出3条树突，分叉一到两次。树突野呈球形。一条细轴突直接从胞体发出。虎斑物质的微小颗粒分布非常密集，并深入到树突的起始段。II型——多极细胞。这些神经元有7 - 9条粗树突，分叉两次。树突野呈球形。一条2微米粗的轴突直接从胞体发出。细胞内含有虎斑物质的粗球形颗粒。III型——梭形细胞。从胞体的两极发出2 - 3条粗树突，先分叉，然后再发出2 - 3条分支。在细胞的每一极都有一个单独的呈流线状的树突野。轴突从胞体的侧面发出。虎斑物质呈细长条带形。IV型——圆形细胞。三条粗树突集中在细胞的一极。树突发出侧支并分支。树突野呈流线状。轴突从胞体发出，与树突相距较远。虎斑物质的粗颗粒均匀分布在细胞内。
