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Personality Moderates Intra-Individual Variability in EEG Microstates and Spontaneous Thoughts.

Miralena I Tomescu1,2,3, Claudiu Papasteri4,5, Alexandra Sofonea4

  • 1Department of Psychology, Faculty of Educational Sciences, University "Stefan cel Mare" of Suceava, Suceava, Romania. miralena.tomescu@gmail.com.

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This summary is machine-generated.

Brain activity dynamics, measured by electroencephalography (EEG) microstates, fluctuate daily and link to spontaneous thoughts. Personality traits influence these brain-mind connections, offering insights into neuropsychiatric disorders.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psychology

Background:

  • Intra-individual variability in brain activity is often disregarded as noise.
  • Studying dynamic brain function offers insights into the brain's adaptable nature.
  • Electroencephalography (EEG) microstates represent fundamental, large-scale neuronal network states.

Purpose of the Study:

  • To investigate the day-to-day variability in the association between EEG microstates and spontaneous mental activity.
  • To explore how changes in spontaneous cognition relate to alterations in EEG microstate dynamics.
  • To examine the moderating role of personality traits on the relationship between EEG microstates and spontaneous thoughts.

Main Methods:

  • Analyzed resting-state EEG microstate dynamics and self-reported spontaneous mental activity in 43 participants.
  • Recordings were conducted on two separate days, with an average delay of 20 days between sessions.
  • Statistical analyses examined inter-day changes in microstate-cognition associations and the influence of personality traits.

Main Results:

  • The associations between EEG microstates and spontaneous cognition significantly differed between recording days.
  • Inter-day changes in specific spontaneous thoughts (e.g., thoughts about others, future planning) correlated with changes in EEG microstate network engagement (sensory vs. attention/salience networks).
  • Personality traits (extraversion, neuroticism, agreeableness, openness) moderated the relationship between daily changes in EEG microstates and spontaneous thoughts.

Conclusions:

  • The organization of EEG microstates and spontaneous cognition is dynamic and varies within individuals over time.
  • These day-to-day brain-mind dynamics are influenced by personality traits.
  • Understanding these dynamic changes is crucial for developing targeted interventions for neuropsychiatric disorders.