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Related Experiment Video

Updated: May 21, 2026

Simultaneous Eye Tracking and Single-Neuron Recordings in Human Epilepsy Patients

Simultaneous Eye Tracking and Single-Neuron Recordings in Human Epilepsy Patients

Published on: June 17, 2019

Frontal-occipital connectivity during visual search.

Spiro P Pantazatos¹, Ted K Yanagihara, Xian Zhang

¹fMRI Research Laboratory, Columbia University Medical Center, New York, NY 10032, USA.

Brain Connectivity

|June 20, 2012

Summary

This summary is machine-generated.

This study reveals that the ventromedial prefrontal cortex (vmPFC) and lateral occipital cortex (LOC) interact during visual search. These findings highlight frontal-occipital neuronal connections in complex object recognition tasks.

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Published on: March 21, 2019

Area of Science:

Neuroscience
Cognitive Neuroscience
Neuroimaging

Background:

Previous research identified prefrontal cortex interactions with visual regions for detection and discrimination tasks.
It remained unclear if similar mechanisms applied to complex visual search.

Purpose of the Study:

To investigate interactions between frontal and visual brain regions during visual search.
To test if high-level frontal regions, involved in expectation and imagery, connect with object recognition areas during search.

Main Methods:

Functional magnetic resonance imaging (fMRI) was used while subjects performed a visual search task in complex scenes.
Independent component analysis and psychophysiological interaction analyses were employed.
Diffusion-tensor imaging (DTI) was used to examine white-matter tracts.

Main Results:

fMRI revealed task-related components involving visual cortex and ventromedial prefrontal cortex (vmPFC).
Increased functional connectivity was observed between vmPFC and object-sensitive lateral occipital cortex (LOC).
Dynamic causal modeling suggested bidirectional connections between vmPFC and LOC, modulated by the task. DTI confirmed white-matter tracts between these regions.

Conclusions:

This study demonstrates specific frontal-occipital neuronal interactions during complex visual search.
Findings extend current models by including top-down and bottom-up processing involving vmPFC and LOC connectivity.