A Dorsal versus Ventral Network for Understanding Others in the Developing Brain

Area of Science:

• Cognitive Neuroscience
• Developmental Psychology
• Neuroscience

Background:

• Theory of Mind (ToM) is crucial for social interaction, traditionally thought to emerge around age 4.
• Preverbal infants show non-verbal action prediction abilities, suggesting earlier social cognition development.
• The neural basis of early non-verbal ToM capacities and their distinction from verbal ToM remain unclear.

Purpose of the Study:

• To investigate the neural networks supporting non-verbal action prediction and verbal ToM in young children.
• To compare the maturation of nerve fiber connections associated with these distinct ToM abilities.
• To understand the developmental trajectory of social cognition in early childhood.

Main Methods:

• Examined nerve fiber tract maturation in 3- to 4-year-old children using neuroimaging techniques.
• Correlated brain network maturation with performance on non-verbal action prediction and verbal ToM tasks.
• Compared neural correlates of non-verbal and verbal ToM reasoning.

Main Results:

• Identified a ventral network for non-verbal action prediction linked to the salience network.
• Identified a dorsal network for verbal ToM associated with the arcuate fascicle and cingulum (default network).
• Non-verbal abilities correlated with ventral tracts, while verbal ToM correlated with dorsal tracts.

Conclusions:

• Young children's non-verbal action prediction may rely on salient social cues processed by the salience network.
• Verbal ToM performance is associated with maturation of connections within the default network.
• Findings challenge the notion of mature ToM emerging solely at age 4, highlighting distinct developmental pathways.