[The reactivity of the major vessels of the human brain based on the data of transcranial dopplerography].

Clinico-physiological studies of 426 healthy subjects revealed normal parameters of the blood flow linear velocity along the extra- and intracranial portions of major cerebral vessels as determined by means of transcranial dopplerography. Normal parameters of the systolic-diastolic coefficient, the reactivity of major vessels and their pial draining network were studied in respect to their responses to functional loads of physical and chemical character which enabled one to determine functional possibilities of the cerebral circulation system. The ability of the dopplerographic technique was assessed in respect to studying of separate control mechanisms of the brain circulation system.