Executive dysfunction is associated with an altered executive control network in pediatric temporal lobe epilepsy

Area of Science:

• Neuroscience
• Pediatric Neurology
• Cognitive Neuroscience

Background:

• Children with temporal lobe epilepsy (TLE) often present with executive dysfunction.
• Limited evidence exists linking this dysfunction to specific neural network alterations.

Purpose of the Study:

• To investigate working memory deficits in children with TLE using functional magnetic resonance imaging (fMRI).
• To examine executive control network (ECN) activation during a working memory task.
• To correlate fMRI findings with behavioral data from neuropsychological tests.

Main Methods:

• fMRI was used to assess ECN activation in 17 children with TLE and 18 controls during an N-back task.
• Neuropsychological assessments included the Delis-Kaplan Executive Function System (D-KEFS).
• Behavioral metrics: N-back accuracy, reaction time, and D-KEFS performance.

Main Results:

• Children with TLE demonstrated executive dysfunction (D-KEFS), reduced N-back accuracy, and slower reaction times compared to controls.
• Significant correlations were found between D-KEFS and N-back task performance.
• TLE group showed reduced frontal lobe ECN activation, correlating with behavioral deficits.

Conclusions:

• Executive dysfunction in children with TLE is associated with alterations in the executive control network.
• Findings support the ECN's role in working memory function.
• Network alterations extend to non-temporal brain regions in pediatric TLE.