Connectivity-based parcellation of the human frontal pole with diffusion tensor imaging

Area of Science:

• Neuroscience
• Brain Anatomy
• Functional Connectivity

Background:

• The human frontal pole (Brodmann's area 10) is a complex cortical region.
• Its functional diversity suggests the presence of specialized subregions.
• Understanding these subregions is key to deciphering frontal pole functions.

Purpose of the Study:

• To parcellate the human frontal pole into distinct functional subregions.
• To investigate the anatomical and functional connectivity patterns of these subregions.
• To determine the network affiliations of identified frontal pole subregions.

Main Methods:

• Diffusion tensor imaging (DTI) data was used to analyze anatomical connection patterns.
• A spectral clustering algorithm was applied to parcellate the frontal pole.
• Resting-state functional connectivity was analyzed to validate anatomical findings.

Main Results:

• The frontal pole was parcellated into orbital (FPo), lateral (FPl), and medial (FPm) subregions.
• FPo showed strong connections to the social emotion network (SEN).
• FPl connected to the cognitive processing network (CPN), and FPm to the default mode network (DMN).

Conclusions:

• The human frontal pole comprises three separable subregions (FPo, FPl, FPm).
• These subregions exhibit distinct anatomical and functional connectivity profiles.
• Each subregion is associated with specific large-scale brain networks and functions.