[Effect of ischemia and recirculation on spinal ganglia cells in dogs]

A single (40 min) ischemia produces indistinct reversible changes in ultrastructure of cells in the spinal nodes. A repeated ischemia (2 X 40 min) with recirculation produces microstructural lesions both in neural cells and in satellite-cells and capillaries, intensity of the lesions depending on the distance from the ligation (the greatest lesion is situated immediately under the ligation). Most of the neurons are crumped, dark and abundantly vacuolized. In the inferior lumbar and sacral nodes the changes are of moderate character. In all the cases glycogen is accumulating in neurons and satellites with an intact structure. Changes in vessels are more essential after ischemia and recirculation: processes of endothelial cells protrude into the lumen, this, in its turn, results in accumulation of erythrocytes packing tightly the capillaries.