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Default network connectivity decodes brain states with simulated microgravity.

Ling-Li Zeng1, Yang Liao2, Zongtan Zhou1

  • 1College of Mechatronics and Automation, National University of Defense Technology, Changsha, 410073 Hunan People's Republic of China.

Cognitive Neurodynamics
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PubMed
Summary
This summary is machine-generated.

Astronauts

Keywords:
ConnectomeDefault networkFunctional magnetic resonance imagingMicrogravityMultivariate pattern analysis

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Area of Science:

  • Neuroscience
  • Space Medicine
  • Human Physiology

Background:

  • Space travel poses challenges to human brain function due to microgravity and confinement.
  • Identifying neuroimaging markers for brain function in space is crucial for astronaut health.
  • Simulated microgravity provides a controlled environment to study these effects.

Purpose of the Study:

  • To investigate changes in brain function and connectivity during simulated microgravity.
  • To identify neuroimaging biomarkers for detecting altered brain states in microgravity.
  • To explore the brain's adaptive mechanisms in response to simulated space conditions.

Main Methods:

  • A 7-day head-down tilt bed rest model simulated microgravity.
  • Resting-state functional magnetic resonance imaging (fMRI) was used.
  • Multivariate pattern analysis (MVPA) assessed functional connectivity changes in the default mode network.

Main Results:

  • Simulated microgravity significantly altered functional connectivity within the default mode network.
  • An MVPA model accurately distinguished between normal gravity and simulated microgravity brain states (≥85% accuracy).
  • Enhanced functional connections between limbic and cortical areas suggest brain self-adaptation.

Conclusions:

  • Brain states differ between normal gravity and simulated microgravity environments.
  • Brain connectome alterations can serve as biomarkers for microgravity-induced brain changes.
  • Findings imply neural adaptations supporting spatial navigation and motor control in space.