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Updated: Nov 7, 2025

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

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Published on: March 21, 2019

Dynamic task-linked switching between brain networks - A tri-network perspective.

Saurabh Bhaskar Shaw¹, Margaret C McKinnon², Jennifer Heisz³

¹Neuroscience Graduate Program, McMaster University, Hamilton, ON, Canada; Vector Institute for Artificial Intelligence, Toronto, ON, Canada; Centre for Advanced Research in Experimental and Applied Linguistics (ARiEAL), Department of Linguistics and Languages, McMaster University, Hamilton, ON, Canada.

Brain and Cognition

|May 1, 2021

Summary

This summary is machine-generated.

The salience network (SN) co-activates with task-relevant brain networks, aiding task switching. This study reveals the SN

Keywords:

Central executive network Connectome-multivariate pattern analyses (connectome-MVPA)Default mode network Graph theory Multivariate Granger Causality (MVGC)Salience network Tri-network model

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Published on: May 7, 2014

Area of Science:

Neuroscience
Cognitive Neuroscience
Systems Neuroscience

Background:

The tri-network model integrates the central executive network (CEN), salience network (SN), and default mode network (DMN) for behavior.
Abnormal connectivity within these networks is linked to neuropsychiatric conditions like PTSD and depression.
The SN is predicted to control anti-correlation between CEN and DMN during task engagement.

Purpose of the Study:

To investigate the temporal dynamics of brain network activity during task switching.
To identify nodes and sub-networks involved in dynamic network switching between tasks.
To characterize the causal influences between these networks during task transitions.

Main Methods:

fMRI data from 14 participants switching between working memory and autobiographical memory tasks.
Multivariate neuroimaging analyses to identify network nodes and sub-networks.
Timecourse analyses and Granger causality measures to assess temporal dynamics and causal influences.

Main Results:

The SN co-activates with the task-relevant network, demonstrating SN-mediated network selection.
Posterior insula and medial temporal nodes show active involvement in SN and DMN task-linked functions.
Dynamic interplay between CEN, DMN, and SN nodes is crucial for effective task-switching.

Conclusions:

The findings provide mechanistic insights into SN-mediated network selection during explicit tasks.
Specific SN and DMN nodes are highlighted for their role in task-linked dynamics.
This study characterizes normative task-linked network dynamics within Menon's tri-network model.