Relationship Between the Parietal Cortex and Task Switching: Transcranial Direct Current Stimulation Combined with an...

Area of Science:

• Neuroscience
• Cognitive Psychology
• Brain Stimulation

Background:

• Task switching involves cognitive processes for shifting attention.
• Transcranial direct current stimulation (tDCS) is used to study the parietal cortex's role in task switching.
• Inconsistent findings highlight the need to understand tDCS mechanisms in task switching.

Purpose of the Study:

• Investigate the modulatory effects of tDCS on task-switching using event-related potential (ERP) analysis.
• Explore the causal relationship between the right parietal cortex and task switching mechanisms.
• Examine potential gender differences in tDCS effects on cognitive control.

Main Methods:

• Twenty-four participants performed predictable and unpredictable parity/magnitude tasks.
• Anodal tDCS and sham conditions were applied over the right parietal cortex.
• Event-related potential (ERP) analysis was used to assess neural activity.

Main Results:

• No significant changes in behavioral performance were observed.
• tDCS induced significant changes in ERP components, particularly the target-N2 and P2 peaks.
• Gender differences were noted in the modulation of the target-N2 component during predictable task switching.

Conclusions:

• The right parietal cortex causally influences exogenous adjustment processes in task switching.
• Anodal tDCS over the right parietal cortex can modulate neural correlates of task switching.
• Gender may influence the effects of right parietal tDCS on cognitive control mechanisms.