Examining individual differences in reading and attentional control networks utilizing an oddball fMRI task

Area of Science:

• Neuroscience
• Cognitive Science
• Developmental Psychology

Background:

• Individual differences in reading and attention are crucial for understanding learning.
• Co-occurring developmental dyslexia and attention deficit hyperactivity disorder suggest shared neural underpinnings.

Purpose of the Study:

• To develop a functional magnetic resonance imaging (fMRI) task to characterize individual differences in reading and attentional control.
• To investigate the neural correlates of reading and attention using an event-related fMRI oddball paradigm.

Main Methods:

• Forty-nine students completed an event-related fMRI oddball task with printed words and false font stimuli.
• Reading network activation was assessed by contrasting word vs. false font conditions.
• Attentional control resources were evaluated by contrasting oddball vs. standard trial conditions.

Main Results:

• Left inferior frontal gyrus and superior/middle temporal gyrus showed differential activation for printed words versus false fonts, correlating with reading abilities.
• Bilateral middle cingulate, insula, and right inferior frontal gyrus showed differential activation for oddball versus standard trials.
• Activation differences in the right superior/middle temporal gyrus and left cerebellum correlated with attentional control measures.

Conclusions:

• The developed fMRI task effectively measures individual differences in both reading and attentional control.
• Findings suggest shared neural resources between reading and attention, offering insights into the comorbidity of developmental dyslexia and ADHD.