The results are presented in 3 parts. The first, or cytological part, deals with the cytological changes in the neurons of the different layers of the cerebellar cortex. For this purpose, sagittal, frontal and horizontal sections of the cerebellum are investigated. In most cases changes in the lobulus II are described. However, all lobuli have been thoroughly investigated. Therefore the first part deals with the question of what normal neuronal development will be in the face of inhibition of certain cellular processes (in this case protein biosynthesis inhibition).