A developmental fMRI study of the Stroop color-word task

Area of Science:

• Neuroscience
• Developmental Neuroscience
• Cognitive Neuroscience

Background:

• The Stroop color-word interference task is a standard measure of executive function.
• Understanding the developmental trajectory of brain activation during cognitive tasks is crucial for assessing neurodevelopment.

Purpose of the Study:

• To investigate age-related changes in brain activation patterns during the Stroop task using functional magnetic resonance imaging (fMRI).
• To identify specific brain regions showing developmental maturation in their response to Stroop interference.

Main Methods:

• fMRI was employed to measure brain activity in 30 participants aged 7-22 years performing a Stroop task.
• Participants were stratified into three age groups: children (7-11), adolescents (12-16), and young adults (18-22).
• Correlational analyses and between-group comparisons were conducted to assess age-related differences in activation.

Main Results:

• Positive correlations between age and Stroop-related activation were found in the left lateral prefrontal cortex, anterior cingulate, and parietal/parieto-occipital cortices.
• Young adults showed greater activation than adolescents in the left middle frontal gyrus.
• Young adults exhibited greater activation than children in the anterior cingulate, parietal, and parieto-occipital regions.

Conclusions:

• Functional development of the parietal lobe during the Stroop task is largely complete by adolescence.
• Prefrontal cortex function associated with Stroop interference continues to mature into adulthood.
• These findings suggest an age-dependent recruitment of neural resources and provide a baseline for studying neurodevelopmental disorders.