Enhancing cognitive control with transcranial magnetic stimulation in subject-specific frontoparietal networks

Area of Science:

• Neuroscience
• Cognitive Psychology
• Brain Stimulation

Background:

• Cognitive control processes exhibit significant inter-individual variability, impacting both basic and clinical research.
• Distinct frontoparietal networks are linked to specific cognitive functions like switching, inhibition, and working memory updating.
• Limited research has explored the role of these networks at an individual level.

Purpose of the Study:

• To investigate the role of intrinsic frontoparietal networks in cognitive control at the individual level.
• To test the hypothesis that stimulating the fronto-parietal control network (FPCN-B) enhances cognitive control performance.
• To compare the effects of stimulating the FPCN-B, Dorsal Attention Network (DAN), and a control site.

Main Methods:

• A within-subject excitatory transcranial magnetic stimulation (TMS) study was conducted on 19 healthy participants.
• Person-specific intrinsic frontoparietal networks were identified using resting-state functional magnetic resonance imaging (fMRI).
• Participants performed set switching, working memory (n-back), and inhibition (Stroop) tasks.

Main Results:

• Stimulation of the FPCN-B significantly enhanced set switching performance.
• Evidence suggested performance enhancement in higher-demand n-back task conditions following FPCN-B stimulation.
• No significant effects were reported for the Dorsal Attention Network or control site stimulation.

Conclusions:

• The FPCN-B may play a crucial role in cognitive control, particularly under higher task demands or when proactive control is required.
• Personalized targeting of intrinsic brain networks using TMS is a feasible approach for future research.
• This study highlights the potential of network-specific brain stimulation for understanding and potentially modulating cognitive functions.