Late EEG after-effects in humans following hyperventilation. II. A comparison between subjects with different level of adaptation to hypoxia.
The late EEG after-effects following application of a short-lasting ventilatory interoceptive influence (3 min hyperventilation-HV) were studied in humans with three degrees of adaptation: students (ST) with a lower degree of training, professional alpine climbers with a high level of training (AL1) and the same subjects (AL2) in a middle position of adaptation i.e. 6 months after an expedition. ST developed late EEG after-effects, consisting mainly in an increase of the beta-2 EEG activity; AL1 showed very slight changes, while in AL2 the EEG after-effects were intermediate. It is suggested, that a lower level of adaptation facilitates the triggering through HV of processes in the cortical EEG which accompany an improvement of the brain tone.
Nikolov
N D
ND
Brain Research Institute, Bulg. Academy of Sciences, Sofia.
Ivanov
M
M
Aladjov
M
M
Duridanova
V
V
Kisselkova
E V
EV
D000222:Adaptation, Physiological / Q000502:physiology*; D000328:Adult; D000531:Altitude; D004569:Electroencephalography; D006801:Humans; D006985:Hyperventilation / Q000503:physiopathology*; D000860:Hypoxia / Q000503:physiopathology*; D008297:Male; D013997:Time Factors