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Related Experiment Video

Updated: Jun 4, 2026

Dynamic Inter-subject Functional Connectivity Reveals Moment-to-Moment Brain Network Configurations Driven by Continuous or Communication Paradigms
08:36

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Reproducibility of single-subject functional connectivity measurements.

J S Anderson1, M A Ferguson, M Lopez-Larson

  • 1Division of Neuroradiology, University of Utah School of Medicine, Salt Lake City, 84132, USA. andersonjeffs@gmail.com

AJNR. American Journal of Neuroradiology
|January 29, 2011
PubMed
Summary

Resting-state functional connectivity (rsFC) requires approximately 25 minutes of imaging time for reliable individual discrimination. Task modulation significantly impacts rsFC profiles, with reliable discrimination achieved within 15 minutes.

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Brain Connectivity

Background:

  • Resting-state functional connectivity (rsFC) is crucial for characterizing neurological and developmental conditions.
  • Determining the necessary imaging duration for reproducible rsFC measurements is vital for single-subject diagnostics.

Purpose of the Study:

  • To ascertain the minimum imaging time required for reliable quantitative rsFC measurements.
  • To establish the duration needed for a dependable single-subject diagnostic test.

Main Methods:

  • Acquired 100 five-minute BOLD scans from one subject at rest or watching videos.
  • Compared subject data with rsFC scans from 36 healthy controls.
  • Analyzed correlations between 64 spherical regions of interest.

Main Results:

  • Reliable rsFC estimates converged proportionally to 1/sqrt(n) for both single-subject and group data.
  • Significant reliability improvements were observed with ≤25 minutes of imaging time.
  • Individual connectivity "fingerprints" diverged around 15 minutes, with accuracy increasing up to 4 hours.

Conclusions:

  • Task-modulated functional connectivity profiles for individuals and control populations can be reliably discriminated with sufficient imaging time.
  • rsFC analysis can differentiate individuals from control groups with adequate data acquisition.