A clinically applicable functional MRI memory paradigm for use with pediatric patients.

Area of Science:

• Neuroimaging
• Epilepsy Research
• Pediatric Neurology

Background:

• Functional MRI (fMRI) memory paradigms are crucial for pediatric epilepsy surgery workups but are not yet standardized.
• Establishing reliable fMRI memory tasks is essential for accurate presurgical planning in pediatric patients.

Purpose of the Study:

• To evaluate the effectiveness of newly developed fMRI memory tasks in a clinical pediatric setting.
• To quantify individual activation patterns and compare them with temporal lobe (TL) pathology laterality.
• To compare fMRI results with Wada test outcomes.

Main Methods:

• Retrospective analysis of 72 pediatric patients (aged 6.7-20.9 years) with TL pathology undergoing presurgical fMRI.
• Utilized autobiographical memory and language fMRI tasks, with quantitative assessment of blood oxygenation level dependent (BOLD) signal change.
• Compared fMRI activation patterns between left and right TL pathology and correlated with Wada test results.

Main Results:

• 60 out of 72 patients (83%) successfully completed the memory fMRI tasks.
• Successful fMRI studies demonstrated bilateral mesial temporal activation.
• Activation patterns differed based on TL pathology laterality, showing concordance with existing literature and Wada test results.

Conclusions:

• The developed fMRI memory task paradigm is effective for eliciting reliable individual activation in pediatric patients.
• This paradigm shows potential for clinical use in presurgical evaluations for pediatric epilepsy surgery.
• Further research is needed to assess the predictive value of this fMRI memory task for surgical outcomes.