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Updated: Dec 12, 2025

Correlating Behavioral Responses to fMRI Signals from Human Prefrontal Cortex: Examining Cognitive Processes Using Task Analysis

Correlating Behavioral Responses to fMRI Signals from Human Prefrontal Cortex: Examining Cognitive Processes Using Task Analysis

Published on: June 20, 2012

Neural correlates of task-related refixation behavior.

Radha Nila Meghanathan¹, Cees van Leeuwen¹, Marcello Giannini²

¹Laboratory for Perceptual Dynamics, Brain & Cognition Research Unit, KU Leuven - University of Leuven, Leuven, Belgium; Center for Cognitive Science, University of Kaiserslautern, Kaiserslautern, Germany.

Vision Research

|August 16, 2020

Summary

Working memory load during visual search impacts eye movements. Higher memory demands for task-relevant items, especially during initial fixations, alter saccade preparation, as seen in EEG signals.

Keywords:

EEG Free viewing Saccade planning Task relevance Visual search

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Published on: December 7, 2018

Area of Science:

Cognitive Neuroscience
Ophthalmology
Psychology

Background:

Attention shifts precede eye movements (saccades).
The influence of cognitive load during fixation on subsequent saccade planning is not fully understood.
Saccade-related potentials (SRPs) in EEG reflect saccade preparation.

Purpose of the Study:

To investigate if higher-order processing, specifically visual working memory load, affects the cost of attention shifts.
To examine differences in SRPs between first fixations and refixations on task-relevant items versus distractors.

Main Methods:

A free viewing visual search task with memorization of multiple targets among distractors.
EEG recording to measure saccade-related potentials (SRPs).
Comparison of SRPs during first fixations versus refixations on targets and distractors.

Main Results:

Saccade preparation is influenced by task-relevance and refixation behavior.
For task-relevant items, first fixations showed longer duration and higher occipital SRP amplitudes than refixations.
Opposite effects were observed in frontal regions for task-relevant items.

Conclusions:

Working memory loading of task-relevant information during fixation impacts saccade planning.
Provides neurophysiological evidence linking cognitive load and eye movement control.
Highlights the role of memory demands in modulating attention shifts.