Does prefrontal connectivity during task switching help or hinder children's performance?

Area of Science:

• Cognitive Neuroscience
• Developmental Psychology
• Neuroscience

Background:

• Flexible task switching is crucial for goal-directed behavior and develops throughout childhood.
• Task switching difficulties in children may stem from inefficient sustained and transient control processes.
• Frontoparietal regions, vital for control processes, mature during childhood, influencing task switching development.

Purpose of the Study:

• To investigate age-related differences in frontoparietal region modulation during sustained and transient cognitive control demands.
• To explore the relationship between brain activity, connectivity, and task switching performance in children and adults.

Main Methods:

• Examined task switching performance and frontoparietal brain activity (fMRI) in children (8-11 years) and adults.
• Assessed sustained and transient control demands using single-task and mixed-task blocks.
• Analyzed functional connectivity between the inferior frontal junction (IFJ) and lateral prefrontal cortex (lPFC).

Main Results:

• Children exhibited greater performance costs than adults, particularly under sustained demand.
• Children showed less upregulation of sustained and transient control activation in frontoparietal regions compared to adults.
• Children displayed increased IFJ-lPFC connectivity from single to mixed blocks, with performance correlating with connectivity in relation to activation patterns.

Conclusions:

• Children's task switching abilities are less efficient than adults', reflecting developmental differences in frontoparietal control.
• Individual differences in task switching performance in children are partly associated with the recruitment of frontoparietal regions.
• Task switching development in later childhood involves adopting more adult-like recruitment and connectivity patterns within frontoparietal networks.