Clinical Neuroscience

[Changes in brain bioelectrical activity in experimental hyperoxia]

SZÁM István, NIKOLITS Ilona, GOTTSEGEN György

JANUARY 01, 1966

Clinical Neuroscience - 1966;19(01)

[The electroencephalogram of experimental rats exposed to oxygen at 3.7 atm - recorded by means of built-in cortical electrodes - shows coarse, non-specific amplitude and frequency changes and spike discharges. The onset of EEG changes precedes the onset of respiratory and cardiac impairment and the earliest phase of the development of 'hyperoxic' pulmonary oedema; arterial blood 02 saturation is also normal at this time. The sequestration of CO2 produced by the animals, and thus the prevention of CO2 rebreathing, delays the onset of EEG changes and partially prevents the development of spike potentials. Impaired bioelectrical activity in the brain is the earliest symptom of oxygen toxicity. ]

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