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[High concentration of erythrocytes in blood circulating in the brain].

In experiments on rabbits the red cell count was determined in venous blood from the brain and hind limbs. It appeared that under normotensive conditions the red cell concentration in blood from the brain is by ca. 20% higher than in the peripheral blood of the same animals. The differences increased (by ca. 34%) under hypotensive conditions. These results are considered as new evidence for the phenomenon of specific distribution of red cells in the arterial ramifications of the organs where the blood flow rate and metabolic demands are the highest.