A developmental fMRI study of self-regulatory control.

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Neuroscience

Background:

• Self-regulatory control is crucial for goal-directed behavior.
• Developmental changes in self-regulatory control are well-documented but neural underpinnings require further investigation.
• The Stroop interference task is a standard measure of cognitive control and inhibition.

Purpose of the Study:

• To investigate the neural correlates of self-regulatory control across development using functional magnetic resonance imaging (fMRI).
• To examine how brain activation patterns during a self-regulatory task change with age and correlate with behavioral performance.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to scan 70 healthy individuals aged 7 to 57 years.
• Participants performed the Stroop interference task, requiring inhibition of reading to name color.
• Task-related brain activity was analyzed for correlations with age and behavioral performance.

Main Results:

• fMRI signal magnitude increased with age in the right inferolateral prefrontal cortex (Brodmann area 44/45) and right lenticular nucleus.
• Greater activation in these regions correlated with better performance on the Stroop task.
• Age-related increases in right frontostriatal activity were associated with improved response inhibition.

Conclusions:

• Developmental changes in frontostriatal activity underlie improvements in self-regulatory control.
• Neural maturation in regions like the right inferolateral prefrontal cortex is key to enhanced cognitive control with age.
• Findings support the role of frontostriatal circuits in the development of self-regulatory abilities throughout the lifespan.