Topographic Mapping as a Basic Principle of Functional Organization for Visual and Prefrontal Functional Connectivity

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Computational Neuroscience

Background:

• Understanding brain region interactions is key to deciphering information processing.
• Functional connectivity patterns reveal how different brain areas communicate.

Purpose of the Study:

• To extend connective field mapping to 3D space for estimating corticocortical functional organization.
• To investigate topographic organization in functional connectivity across the human cortex.

Main Methods:

• Utilized resting-state functional magnetic resonance imaging (fMRI) data from multiple human samples.
• Applied a 3D connective field mapping methodology to analyze functional connectivity.
• Performed model testing and replication analysis on publicly available datasets.

Main Results:

• Confirmed topographic relationships in early visual cortex connectivity along the anterior-posterior axis.
• Observed convergence and biased sampling in higher-order visual regions.
• Demonstrated topographic organization as a fundamental principle across the cortex, stronger within than between functional networks.
• Identified functional gradients of topographic connectivity and convergence in the lateral prefrontal cortex, predicting task-based activation.

Conclusions:

• Topographic input is a fundamental motif in cortical functional connectivity for information processing.
• The maintenance of topographic organization is crucial for preserving information integrity between brain regions.
• Findings suggest widespread topographic principles governing information flow throughout the human brain.