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KMID : 0613820090190121829
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Journal of Life Science
2009 Volume.19 No. 12 p.1829 ~ p.1835
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Quantitative Electroencephalogram Alteration by Ventilation Volume of Hyperventilation
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Kim Young-Sik
Choi Hyun-Ju
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Abstract
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Hyperventilation (HV) is routinely induced in order to activate brain waves during an electroencephalogram (EEG). The aim of this study was to examine the effects of HV conditions on EEG and suggested basic data for the standardized procedure. Three degrees of HV were induced for 5 minutes with a ventilation volume of 160 ㎖/min (control group), 240 ㎖/min, and 300 ㎖/min in rats. Powers of delta, theta, alpha, and beta waves were examined by a quantitative EEG. The results showed that there was no significant difference in the powers of all EEG waves between the control and 240 ㎖/min groups. However, a notable change in EEG powers during HV induced by a ventilation volume of 300 ㎖/min was observed in the frontal cerebral region as follows: power of the delta was increased by 12.8% (p＜0.01), powers of the theta, alpha and beta were decreased by 41.3% (p＜0.01), 48.6% (p＜0.05), and 41.9% (p＜0.05), respectively. Therefore, it is concluded that an increase of about 90% of the normal ventilation volume might be adequate for the hyperventilation, and a useful parameter for evaluation of the qualified hyperventilation might be an alteration of the frontal EEG powers.
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KEYWORD
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Electroencephalogram, QEEG, hyperventilation, ventilation volume
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