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This summary is machine-generated.

Brain parcellation significantly impacts the relationship between structural and functional connectivity. The number of brain areas and spatial embedding, not just data reliability, influence these findings, suggesting parcellation choice is often convenience-based.

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Area of Science:

  • Neuroscience
  • Neuroimaging
  • Brain Connectivity

Background:

  • Neuroscience research explores the link between brain structure and function.
  • Magnetic Resonance Imaging (MRI) studies show a correlation between structural connectivity (brain wiring) and functional connectivity (synchronization patterns).
  • The impact of brain parcellation methods on this structural-functional relationship remains unclear.

Purpose of the Study:

  • To investigate how different brain parcellations affect the relationship between structural and functional connectivity.
  • To determine if the definition of brain areas influences the observed structural-functional connectivity link.
  • To compare various state-of-the-art group-wise brain atlases with differing spatial resolutions.

Main Methods:

  • Utilized high-quality MRI data to derive structural connectivity (SC) and functional connectivity (FC) estimates.
  • Compared multiple group-wise brain atlases with varying spatial resolutions and numbers of areas.
  • Analyzed the consistency and influence of parcellation choices on the SC-FC relationship.

Main Results:

  • Brain parcellation significantly influences the structural-functional connectivity relationship, primarily due to the number of defined brain areas.
  • The SC-FC relationship shows mixed results when compared to random parcellations.
  • The number of areas does not solely account for the observed differences; spatial embedding (distance effects) also plays a crucial role.

Conclusions:

  • The choice of brain parcellation significantly impacts the analysis of brain connectivity.
  • The number of regions and spatial factors are key determinants of the SC-FC relationship.
  • Current brain parcellation choices in connectivity analyses may often be based on convenience rather than objective necessity.