CNS oxygen toxicity in the rat: role of ambient illumination
Bitterman, N.; Melamed, Y.; Perlman, I.
Undersea Biomedical Research 13(1): 19-25
1986
ISSN/ISBN: 0093-5387 PMID: 3705247 Document Number: 271693
The effect of ambient illumination on sensitivity to CNS oxygen toxicity was studied in awake male rats. Continuous recording of the EEG was obtained with chronically implanted cortical electrodes. The appearance of the electrical discharges in the EEG was used as an end point for CNS oxygen toxicity. It was found that sensitivity to CNS oxygen toxicity was inversely related to the level of ambient light illumination. The latent period for appearance of the electrical discharges was significantly shorter in darkness than in light over most of the oxygen pressures. Rats with severely depressed retinal function were as sensitive to oxygen at high pressure as normal rats in darkness, demonstrating the importance of visual input in the modulation of sensitivity to CNS oxygen toxicity.