二氧化碳浓度升高时大脑活动的反应（作者译）

[Reactions in the brainactivity during increased carbondioxyde concentration (author's transl)].

作者信息

Pfurtscheller G, Metzler H, Szirmai I, Aranibar A, Pfurtscheller B

出版信息

EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb. 1978 Dec;9(4):222-8.

Abstract

A comparative study of two kinds of respiration (normal air and mixed with 4% CO2) was carried out in 8 healthy students. During the three experiments, each one lasting over 120 min, CO2 or air was inhaled using a mask. Blood samples were taken from the fingers, an average increase of pCO2 of 1.9 mm (p less than 0.01) and pO2 of 7.3 mm (p less than 0.01) was found during CO2-inhalation. The ECG and EEG were recorded and reaction times to tone stimuli in a foreperiod reaction time experiment were measured. During CO2-inhalation a clear reduction of the power in the alpha-band was found in frontal, central and occipital region in the order of 23% (p less than 0.05) and 12% (p less than 0.05) and 22% (p less than 0.01). The heart rate interval decreased significantly by 2.3% (p less than 0.05). No significant changes were found in CNV, reaction time and percentage event-related alpha-desynchronization.

摘要

对8名健康学生进行了两种呼吸方式（正常空气和混入4%二氧化碳）的对比研究。在三个持续时间超过120分钟的实验中，使用面罩吸入二氧化碳或空气。从手指采集血样，吸入二氧化碳期间，发现pCO2平均升高1.9毫米（p<0.01），pO2平均升高7.3毫米（p<0.01）。记录心电图和脑电图，并在一个前周期反应时间实验中测量对音调刺激的反应时间。吸入二氧化碳期间，额叶、中央和枕叶区域的α波频段功率明显降低，降低幅度依次为23%（p<0.05）、12%（p<0.05）和22%（p<0.01）。心率间期显著降低2.3%（p<0.05）。在CNV、反应时间和事件相关α波去同步化百分比方面未发现显著变化。