Neural connectivity patterns underlying symbolic number processing indicate mathematical achievement in children

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Science

Background:

• Humans develop symbolic number systems in early childhood for complex numerical thinking.
• The neural basis supporting the development of symbolic number representation remains largely unknown.
• Understanding this development is crucial for identifying early indicators of mathematical ability.

Purpose of the Study:

• To investigate the neural substrates of symbolic number processing in young children using functional magnetic resonance imaging (fMRI).
• To examine developmental changes in brain communication as children map symbols to magnitudes.
• To test the hypothesis that connectivity between the right parietal region and other critical areas changes with symbolic number mastery.

Main Methods:

• fMRI scans were conducted on children aged 4–6 years performing magnitude comparison tasks.
• Tasks included Arabic numerals (symbolic), dot arrays (non-symbolic), and lines (non-numerical).
• Effective connectivity analysis, specifically psychophysiological interaction, was used with a right parietal seed region.

Main Results:

• Significant effective connectivity was found between the right parietal cortex and the left supramarginal gyrus and right precentral gyrus.
• Connectivity strength to the left supramarginal gyrus correlated positively with child age.
• Connectivity strength to the right precentral gyrus predicted performance on a standardized symbolic math test.

Conclusions:

• Developing effective connectivity for symbolic number processing is critical for children mastering the link between numerical symbols and their magnitudes.
• These neural communication patterns serve as potential early indicators of mathematical achievement.
• The study highlights key brain networks involved in the foundational stages of mathematical learning.