Influence of air ions on brain activity induced by electrical stimulation in the rat

The brain induced activity was studied in 18 rats wearing chronically skull implanted electrodes. The stimulating factor was various electrical stimulations of the mesensephalic reticular activating formation, given during the slow wave state of sleep. The results of 300 stimulations were measured b...

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Bibliographic Details
Published in:International journal of biometeorology 1981-03, Vol.25 (1), p.63-69
Main Authors: Olivereau, J M, Lambert, J F, Truong-Ngoc, A
Format: Article
Language:English
Subjects:
Air
Animals
Arousal - physiology
Electric Stimulation
Electrodes, Implanted
Electroencephalography
Ions
Male
Mesencephalon - physiology
Rats
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Summary:The brain induced activity was studied in 18 rats wearing chronically skull implanted electrodes. The stimulating factor was various electrical stimulations of the mesensephalic reticular activating formation, given during the slow wave state of sleep. The results of 300 stimulations were measured by amplitude and frequency changes in the EEG simultaneously recorded. Animals previously exposed to positive air ions (3 weeks 80,000 ions/ml) exhibited lowered excitability of the reticulocortical system. Significantly higher stimulations were necessary to induce arousal. Negative air ions induced more intricate effects: brain excitability was lowered when tested with weak stimulations, but normal when evaluated with medium high level stimilations. Sleep seems first more stable but as stimulation increases, arousal is soon as effective as in controls. These results are in agreement with others findings in behavioral fields and partly explains them.
ISSN:0020-7128
1432-1254
DOI:10.1007/BF02184440