Brain's Functional Organization Remains Stable Within Individuals Over Years, Study Finds
A longitudinal neuroimaging study found that the brain's functional network organization—the coordinated activity patterns between brain regions—remains remarkably stable within individuals over periods of up to 13 years. The research involved high-resolution fMRI scans of 13 participants collected at multiple time points, with findings replicated in an independent 10-year follow-up dataset. This stability suggests that individualized brain organization may be a persistent feature of personal identity, potentially maintained by homeostatic mechanisms.
Researchers conducted a longitudinal precision fMRI study to determine whether functional brain networks—large-scale patterns of coordinated neural activity—are stable features within individuals or fluctuate over time. They collected extensive neuroimaging data (≥60 minutes per participant per session) from 10 healthy young adults across 1-3 year intervals and three additional adults over 8-13 years, then replicated their findings using the MyConnectome dataset and its 10-year follow-up. The analysis revealed that functional network organization remained largely stable within individuals across these extended periods when sufficient per-participant data were collected. These findings suggest that individualized brain organization constitutes persistent characteristics that may reflect aspects of personal identity and could be maintained through homeostatic regulatory mechanisms in the brain.
What's missing
The study's limitations regarding sample size (13 total participants, with only 3 followed over 8-13 years) and generalizability to diverse populations (described as 'healthy young adults') are not explicitly discussed in the provided abstract. Additionally, the mechanisms by which homeostatic processes maintain this stability remain unspecified.
What different sources said
- bioRxivCenter
Functional brain organization is stable within individuals across years
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