The impact of hyperventilation on brain alpha activity: An EEG study
Xiaodong Yang1, Fugui Qi2, Chunhong Li3
1School of Psychological and Cognitive Sciences, Peking University, Beijing 100871, China; Naval Medical Center, Naval Medical University, Shanghai 200433, China.
Brain Research Bulletin
|April 10, 2025
Summary
Hyperventilation significantly impacts brain activity, slowing alpha peak frequency and reducing alpha power and functional connectivity. These changes indicate a negative effect of hyperventilation on neural processing.
Area of Science:
- Neuroscience
- Physiology
- Cognitive Science
Background:
- Hyperventilation (HV) poses risks in hypoxic environments, potentially impairing cognitive function.
- The specific effects of HV on EEG alpha activity, crucial for cognition, remain underexplored.
Purpose of the Study:
- To investigate changes in EEG alpha activity power spectrum and functional connectivity (FC) induced by HV.
- To quantify the impact of HV on neural activity patterns.
Main Methods:
- Recorded EEG data from 305 healthy young males during Pre-HV, HV, and Post-HV stages.
- Analyzed EEG power spectrum, adjusting for aperiodic components to determine alpha peak frequency (APF) and power (AP).
- Assessed functional connectivity (FC) using the weighted Phase Lag Index (wPLI).
Main Results:
- Alpha peak frequency (APF) and adjusted APF showed a U-shaped trend, decreasing during HV and recovering post-HV.
- Alpha peak power (AP) and adjusted AP decreased during HV.
- Functional connectivity (FC) decreased during HV with a rightward lateralization shift, followed by an increase post-HV.
Conclusions:
- Both EEG alpha power spectrum and FC metrics exhibit a U-shaped pattern in response to HV.
- HV negatively impacts alpha activity, affecting both its power and connectivity.
- Findings offer quantitative insights into HV's regulatory effects on neural activity and alpha oscillations.
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