[Influence of the sympathetic nervous system on the electrical activity of the neuronally isolated cerebral cortex].

Bilateral transection of the pregangiolinic sympathetic cervical fibers and electrical stimulation of ipsilateral cranial and of the cervical sympathetic nerve originated reactions differing in strength and latency in intact hemisphere and in neuronally isolated neocortex, but having common origin mainly due to changes in the capacities of the delta--and theta--potentials. The direct nervous influences on electrical activity of the neuronally isolated neocortex through sympathetic fibers passing along the blood vessels, seems to be insufficient.