fMRI language task panel improves determination of language dominance

Area of Science:

• Neuroimaging
• Epilepsy Research
• Language Processing

Background:

• Functional MRI (fMRI) is used for presurgical language mapping in epilepsy.
• Single fMRI paradigms may yield results inconsistent with the intracarotid amobarbital test (IAT).

Purpose of the Study:

• To evaluate if a panel of fMRI tasks enhances accuracy in determining hemisphere language dominance.
• To assess the utility of a multi-task fMRI approach for presurgical language lateralization.

Main Methods:

• Twenty-six epilepsy patients (age 12-56) underwent whole-brain fMRI using verbal fluency, reading, and auditory comprehension tasks.
• fMRI results were visually rated, and language lateralization was compared with the intracarotid amobarbital test (IAT).

Main Results:

• The fMRI task panel demonstrated high agreement with IAT results (21/25 patients).
• A panel of tasks improved interrater reliability compared to single tasks (Cramer V 0.93 vs 0.72).
• The panel approach reduced ambiguous findings and enhanced diagnostic consistency.

Conclusions:

• A panel of fMRI language tasks offers greater accuracy for language dominance assessment in epilepsy patients than single tasks.
• Utilizing a multi-task fMRI approach improves diagnostic reliability and confirms language laterality for surgical planning.