The function of the circulatory system in the widest sense is to provide adequate microcirculation in every part of the body. The intensity of the capillary circulation in any part of the brain, for instance, is determined by the overall pressure gradient in its vascular system and also by the total resistance from the aorta to that particular capillary network (the capillaries and veins play a minor role in the regulation of cerebrovascular resistance Investigation of functional behavior of different parts of the vascular system and its effect on the cerebral hemodynamics is nothing more than the study of the microcirculation in the brain in the broad meaning of this concept . In this book an attempt has been made to generalize the results of research of this type into the cerebral circulation.
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