[Effect of single gravitational overloading on various parts of the brain (experimental electron and light microscopic study)].

After application of single gravitational overloadings on the cat brain, perivascular edema, peripheral chromatolysis and cytoplasmic edema in neurons, dendrites and astrocytes have been observed. Some shifts in ultrafine composition of presynaptic buds and vascular walls have been described. Structures of myelin and amyelin fibers are preserved. Ultrastructural reconstructions are expressed differently in different brain structures in connection with their functional differentiation. The reconstructions revealed are of reversible character.