[Bioelectrical activity of the brain, cerebral circulation, and heart rate regulation in the early period of isolated cranio-cerebral injuries].

Combined clinico-physiological examination (electroencephalographic, rheoencephalographic and cardiointervalographic) of 48 victims with early-stage isolated craniocerebral injuries were carried out. From the results of the examination it was concluded that the most marked changes of the brain bioelectric activity in that period were associated with the diminution of the cerebral circulation. The higher frequencies of the EEG oscillations were found to be due to an increase of the sympathoadrenal system activity. The decrease of the sympathoadrenal activity and the diminution of the cerebral circulation intensity observed on the second-fourth day after the injury can be explained as being due to an increase of the permeability of the cerebral vessels and development of brain tissue edema.