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Individual differences in functional connectivity during naturalistic viewing conditions.

Tamara Vanderwal1, Jeffrey Eilbott1, Emily S Finn1

  • 1Yale University, 230 South Frontage Road, New Haven, CT 06520, USA.

Neuroimage
|June 20, 2017
PubMed
Summary
This summary is machine-generated.

Watching movies during fMRI scans enhances the detection of individual functional connectivity (FC) patterns compared to rest. Dynamic stimuli like movies improve subject identification based on brain activity, revealing unique neural signatures.

Keywords:
Identification algorithmInscapesMoviesNaturalistic viewingfMRI

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Area of Science:

  • Neuroimaging
  • Cognitive Neuroscience
  • Human Brain Imaging

Background:

  • fMRI studies often use resting-state or task-based paradigms.
  • Naturalistic viewing, like movies, can improve participant arousal and reduce motion during fMRI.
  • It remains unclear how naturalistic stimuli affect individual differences in functional connectivity.

Purpose of the Study:

  • To characterize BOLD-signal based functional connectivity (FC) variability across two movie conditions and eyes-open rest.
  • To assess the ability to identify individual subjects based on FC patterns under these conditions.
  • To investigate how dynamic stimuli influence the detection of individual-specific FC.

Main Methods:

  • fMRI data collected from 31 healthy adults across two sessions.
  • Analysis of cluster-wise FC during two distinct movie conditions and eyes-open rest.
  • Application of an unsupervised test-retest matching algorithm to identify subjects based on FC patterns.

Main Results:

  • Movie viewing exhibited higher within- and between-subject FC correlations than rest.
  • Inter-individual variability in FC was concentrated in lateral prefrontal lobes and temporoparietal junctions.
  • Individual subject identification based on FC was possible across all conditions, with movies outperforming rest (up to 100% accuracy).

Conclusions:

  • Dynamic stimuli, such as movies, enhance the detection of individual-specific functional connectivity patterns in fMRI.
  • Movie-based paradigms may offer a more sensitive approach for studying inter-individual differences in brain connectivity.
  • Optimizing fMRI parameters like resolution and scan duration further improves accuracy in identifying individual FC signatures.