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Updated: Dec 30, 2025

Neuronavigated Focalized Transcranial Direct Current Stimulation Administered During Functional Magnetic Resonance Imaging

Neuronavigated Focalized Transcranial Direct Current Stimulation Administered During Functional Magnetic Resonance Imaging

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Investigating the Optimal Baseline Positioning to Maximize Cognitive Experimental Outcome.

Pierluigi Reali, Riccardo Lolatto, Paola De Stefano

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|January 18, 2020

Summary

This summary is machine-generated.

The optimal baseline for cognitive research depends on the metric used. The last baseline stimulus best shows differences in cognitive workload for attention and memory tasks, while post-task relaxation best indicates engagement.

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Area of Science:

Cognitive Neuroscience
Neuroscience
Psychology

Background:

Baselines are crucial for standardizing activation measurements in cognitive and emotional research.
Optimal timing for baseline evaluation in experimental protocols remains uninvestigated.

Purpose of the Study:

To determine the most effective time interval for baseline evaluation in cognitive tasks.
To identify optimal baseline periods for differentiating between baseline states and cognitive effort.

Main Methods:

EEG signals were analyzed during baseline stimuli and cognitive tasks (reaction and working memory).
Global Field Power (GFP) indexes (Attention, Memorization) and Engagement Index (EI) were extracted.
Experimental protocol designed to compare different baseline intervals.

Main Results:

The last baseline stimulus effectively highlighted differences in cognitive workload for Attention and Memorization indexes.
The Engagement Index showed the greatest difference between the reaction task and baseline after a post-task relaxation period.

Conclusions:

The optimal baseline period for maximizing cognitive workload differences varies by index.
Confounding effects and individual differences influence baseline effectiveness.
Further research is needed to validate these findings on baseline optimization.