Material and Methods.- Results.- 1.1. Purkinje Cells.- 1.2. Granule Cells (GL, ML, and GrL).- 1.3. Basket, Stellate, Golgi, and Glia Cells.- 2.- 2.1. Day 7 (Injection on Day 3).- 2.2. Day 8 (Injection on Day 5).- 2.3. Day 9 (Injection on Day 6).- 2.4. Day 11 (Injection on Day 7).- 2.5. Day 12 (Injection on Day 9).- 2.6. Day 14 (Injection on Day 10).- 2.7. Day 15 (Injection on Day 12).- 2.8. Day 18 (Injection on Day 14).- 2.9. Day 61 (Injection on Day 5).- 3.- 3.1. Injection on Day 3.- 3.2. Injection on Day 5.- 3.3. Injection on Day 7.- 3.4. Injection on Day 8.- 3.5. Injection on Day 10.- 3.6. Injection on Day 13.- Discussion.- 1. The Actinomycins.- 2. Morphological Changes in Neurons Caused by Other Metabolic Inhibitors.- 3. Purkinje Cells(PC).- 4. Granule Cells.- 5. Golgi Cells, Basket Cells, and Stellate Cells.- 6. Special Features of the Subsurface System (Hypolemmal Cisterna) in the Purkinje Cells.- 7. Cell Junctions.- 8. Remarks Regarding the Applied Methods.- Summary.- References.

The normal anatomy of the cerebellum has been thoroughly studied by numerous in vestigators over many years. Anatomical aspects in terms of evolution (Dow, 1942; Larsell, 1967; Llinas, 1969; Gregory, 1975), correlative anatomy (Wallenberg, 1931), and morphology (Larsell, 1952; L0ning and Jansen, 1955; Ludwig-Hauri, 1955; Braitenberg and Atwood, 1958; Jansen und Brodal, 1958; Zeman and Innes, 1963) have been presented. Histological features have attracted many investigators (Bergmann, 1857; Denis senko, 1877; Ramon y Cajal and Illera, 1907; Addison, 1911; Jakob, 1928; Snider and Jacobs, 1949; Braitenberg and Atwood, 1958; Baud, 1959; Altman, 1962, 1963, 1966, 1971, 1972a, b, c, 1973a, b, 1975; Birch-Anderson et aI. , 1962; Andres, 1965; Eccles et aI. , 1967; Fox and Snider, 1967; Mugnaini and Forstrl1. lDen, 1967; Del Cerro and Snider, 1968, 1972a, b; O'Leary et aI. , 1968, 1971; Chan-Palay and Palay, 1970, 1971, 1972; Rakic and Sidman, 1970; Das and Altman, 1971; Gobel, 1971; Rakic, 1971; 1972a, b; Chan-Palay, 1972a, b, 1973c, d; Palay and Chan-Palay, 1972, 1974; Sidman and Rakic, 1973; Spacek et aI. , 1973; Das et al. , 1974; Braak, 1975; Crepel and Mariani, 1975; Derrnietzel, 1975a, b; Gregory, 1975; Llinas, 1975; Meller and Tetzlaff, 1975; Cragg, 1976; Rees et aI. , 1976; Zelevic and Rakic, 1976). Investigators of the cytologi cal characteristics of the cerebellar cortex are numerous (Sternberg and Krombholtz, 1838; Smirnow, 1897; Ramon y Fananas, 1916; Larramendi et al.