ON FINE STRUCTURE OF GLIA CELLS IN CEREBELLAR CORTEX OF MAMMALS

The cerebellar cortex of different mammalia was fixed with glutaraldehyde in situ by perfusion and investigated with the light- and electron microscope. Special attention is given to the Fañanas cell, Bergmann glia and astrocytes. The electron microscopic study shows that the Fañanas cell represents a pure satellite glial cell. Glial filaments are absent in the cytoplasmic protrusions which extend within the Purkinje cell layer and the lower part of the molecular layer. The Bergmann fibers belong to the astroglia. They exhibit bundles of glial filaments and are rich of glycogen particles. Most of the cell bodies of the Bergmann fibers lie in the Stratum granulosum, some are to be found within the Purkinje cell layer and the molecular layer. The term Golgi epithelial cell" or "Bergmann glia" should be abandoned because the Bergmann fibers do not belong to the satellite glial cells of the Purkinje cell layer. © 1969 Springer-Verlag."