[Ultrastructural study of the prevertebral ganglia in experimental diabetes].

Prevertebral ganglia of rats with streptozotocin-induced diabetes have been studied by electron microscope, in different periods of evolution of the illness. The cytoplasm of the ganglion cells showed dense deposits of neurofilaments and several degenerative changes as vacuolization and accumulation of residual bodies. The unmyelinated axons were markedly swollen showing degenerative and dystrophic changes which increased with the duration of the diabetes. Control animals of the same age did not show this type of changes.