THE EFFECT OF ELECTRlCAL STIMULATION OF THE BULBAR VASOMOTOR CENTRE ON THE CEREBRAL BLOOD FLOW

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Abstract
In experiments on cats and rabbits the cerebral blood flow could be influenced by electrical stimulation of the bulbar vasomotor centre independent of changes in systemic blood pressure. The cerebral blood flow is not a passive function of systemic blood pressure; the vessels of the brain even take part in the pressor mechanism.Transection of the cervical sympathetic nerve does not change the effect of electrical stimulation of the bulbar vasomotor centre.Changes in cerebral blood flow found in these experiments were not associated with changes in the electrical pattern of the brain. This, as well as the short delay with which changes in blood flow appear, suggest that it is a direct nervous influence that acts on the cerebral vessels.