Posterior Dominant Rhythm in Microgravity
Author Information
Author(s): Kokkinos Vasileios, Koupparis Andreas M., Fekete Tomer, Privman Eran, Avin Ofer, Almagor Ophir, Shriki Oren, Hadanny Amir
Primary Institution: Feinberg School of Medicine, Northwestern University
Hypothesis
Does the posterior dominant rhythm (PDR) change under microgravity conditions compared to earth-based EEG recordings?
Conclusion
The spectral features of the PDR remain within normal limits during short exposure to microgravity.
Supporting Evidence
- The PDR frequency did not vary significantly during the mission.
- EEG features remained stable across pre-mission, mission, and post-mission phases.
- Variability in PDR was within a ±1 Hz range, indicating normal limits.
Takeaway
The brain's rhythm stays normal even when astronauts are in space for a short time.
Methodology
EEG recordings were taken from three crew members before, during, and after a 16-day mission to the ISS using a specialized dry-electrode headset.
Potential Biases
Limited generalizability due to the small number of subjects.
Limitations
The study had a small sample size and occasional artifact contamination in EEG channels.
Participant Demographics
Three crew members of the AXIOM-1 mission.
Statistical Information
P-Value
0.46, 0.92, 0.63, 0.14, 0.78, 0.30
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website