[Blood flow dynamics in adjacent microvessels of the brain in hypertensive rats]

Significant alterations in the blood flow velocity, its amplitude and oscillations were found in cerebral cortex's microvessels of 5-12 mu diameter in normotensive and spontaneously hypertensive rats. Associated alterations of the blood flow shifted by a few seconds, were found in adjacent vessels. These alterations seem to be due to hemodynamic readjustments in proximal parts of the vascular net. The absence of these alterations in adjacent vessels suggests no significant redistribution of the blood flow in resting in cerebral cortex's microvessels.