[FREQUENCY-TEMPORAL STRUCTURE OF HUMAN ELECTROENCEPHALOGRAM IN THE CONDITION OF ARTIFICIAL HYPOGRAVITY: DRY IMMERSION...

Area of Science:

• Neuroscience
• Space Physiology

Context:

• Simulating microgravity effects on Earth using dry immersion (DI) to study hypogravity.
• Investigating hypokinesia, a condition involving weight-bearing and mechanical load removal typical of microgravity.

Purpose:

• To analyze frequency-temporal electroencephalogram (EEG) reactions in male subjects under simulated hypogravity.
• To compare EEG spectral composition changes using Fourier transform and modified wavelet analysis.

Summary:

• Dry immersion for two days led to a decline in alpha power and a slight increase in theta power in EEG spectral composition.
• Wavelet analysis revealed frequency desorganization and temporal instability in EEG dominant rhythms during dry immersion.
• Quantifying these EEG changes offers insights into functional brain cortex disorders under hypogravity.

Impact:

• Wavelet transform provides a quantitative method to assess changes in the brain's electrical activity frequency-temporal structure.
• Findings may elucidate mechanisms underlying functional disorders in the brain cortex experienced in hypogravity conditions.
• Highlights the utility of EEG analysis in understanding human physiological responses to space-like environments.