抄録
1) Effects of electrical stimulation of the brain stem upon hippocampal and neocortical EEGs of the normal rabbit were studied in the acute experiment.
2) Low frequency stimulation (2 or 5/s) of the brain stem produced EEG spikes in both hippocampi with suppression of theta waves when the background EEG exhibited slow theta waves (3-4/s) in the hippocampus and occasional spindle bursts in the neocortex. The neocortical EEG showed no changes during the stimulation.
3) The most effective sites were examined and proved to be nucleus raphe centralis superior and nucleus raphe magnus.
4) Outside the raphe nuclei there existed the sites where the stimulation could produce no such effects regardless of the state of the brain.
