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Related Experiment Video

Updated: Jun 17, 2026

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

Task-dependent individual differences in prefrontal connectivity.

Bharat B Biswal¹, Dana A Eldreth, Michael A Motes

¹Department of Radiology, University of Medicine and Dentistry of New Jersey, Newark, NJ 07103, USA.

Cerebral Cortex (New York, N.Y. : 1991)

|January 13, 2010

Summary

This summary is machine-generated.

Cognitive task demands influence brain activity patterns. High-demand tasks use focused networks, while low-demand tasks utilize broader, fluctuating networks, impacting brain-behavior relationships.

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A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance

A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance

Published on: May 7, 2014

Related Experiment Videos

Last Updated: Jun 17, 2026

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

A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance

A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance

Published on: May 7, 2014

Area of Science:

Neuroscience
Cognitive Psychology
Brain Imaging

Background:

Neuroimaging research on individual differences yields inconsistent results.
Task demands may explain variability in brain-behavior relationships across studies.

Purpose of the Study:

Investigate how varying cognitive task demands affect brain connectivity.
Determine if Granger causality analysis (GCA) can detect task-demand-related neural changes.

Main Methods:

Participants performed low-demand vigilance and high-demand visual search tasks.
Granger causality analysis (GCA) assessed brain region connectivity during tasks.

Main Results:

Significant differences in frontoparietal connections were observed between tasks.
GCA successfully detected neural activity changes correlating with task demand.
Faster individuals showed more vigilance activity but less visual search activity.

Conclusions:

Low-demand performance relies on spontaneous, bidirectional network activity.
High-demand performance involves limited, unidirectional networks requiring executive control.
Brain-behavior relationships are modulated by cognitive demand levels.