in experiments on adult animals ( rabbit , cat , dog ) , it has been found that changes during the initial stages of the effect of high oxygen pressure include : stabilization of the main rhythm of the eeg , inhibition of spindle-like activity and onset ( or the increase ) of interhemispheral asymmetry of the electrocorticogram , the increase of the amplitude of positive wave of primary response and slow negative wave of the evoked potential of the brain cortex , as well as the increase in the threshold level of inhibition of respiration in response to electrical stimulation of the cranial end of the vagal nerve and the increase in the stability of respiration and cardiac activity .
C0006104
brain
C0037303
cranial