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Related Concept Videos

Brain Imaging01:14

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
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Related Experiment Video

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Resting-State Connectivity and Neuroimaging of Prefrontal Cortex Activity During a Block-Design Yoga Asana Practice Using fNIRS
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Resting state functional connectivity changes induced by prior brain state are not network specific.

Chris Tailby1, Richard A J Masterton2, Jenny Y Huang3

  • 1The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Austin Hospital, Victoria, Australia; Department of Psychology, The University of Melbourne, Victoria, Australia.

Neuroimage
|December 3, 2014
PubMed
Summary

Prior brain activity influences resting-state functional connectivity (rFC) networks. These changes, observed after motor tasks, were widespread and not limited to specific brain networks, impacting overall brain connectivity patterns.

Keywords:
BOLDBrain networksFunctional MRIFunctional connectivityResting state

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Brain Imaging

Background:

  • Resting-state functional connectivity (rFC) identifies brain networks without tasks.
  • Prior brain activity is known to influence subsequent rFC results.
  • Understanding these influences is crucial for accurate brain network analysis.

Purpose of the Study:

  • To investigate the prevalence and network specificity of rFC changes after different preceding brain states.
  • To test the hypothesis that prior state-induced rFC changes are specific to the networks engaged by that state.
  • To determine how unstructured, language, and motor tasks affect resting-state brain connectivity.

Main Methods:

  • Acquired three blocks of resting-state fMRI data from 25 subjects after unstructured, language, and motor tasks.
  • Analyzed changes in rFC by comparing timecourses in task-related regions of interest (ROIs).
  • Generated seed-based whole-brain connectivity maps to assess widespread connectivity alterations.

Main Results:

  • Resting-state functional connectivity changes were most pronounced after the motor task.
  • Contrary to the hypothesis, these rFC changes were not specific to the engaged brain networks.
  • Changes often manifested as increased connectivity, affecting primary sensory and cognitive control networks, and reduced across-participant variance with constrained prior states.

Conclusions:

  • Prior brain states significantly alter resting-state functional connectivity.
  • These alterations occur in both related and unrelated brain networks, challenging specificity assumptions.
  • Constrained prior states may lead to more consistent across-participant connectivity measures.