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Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
Published on: September 20, 2024
Interictal and postictal language testing accurately lateralizes language dominant temporal lobe complex partial
Maya J Ramirez1, Bruce K Schefft, Steven R Howe
1Department of Psychology, University of Cincinnati, Cincinnati, Ohio 45221-0376, USA.
Epilepsia
|July 25, 2007
Summary
Language disturbances during and between seizures accurately pinpoint the brain hemisphere where epilepsy originates. These noninvasive tests aid in presurgical evaluations for temporal lobe epilepsy.
Area of Science:
- Neurology
- Epileptology
- Neuroscience
Background:
- Accurate localization of seizure onset is crucial for presurgical evaluation in intractable epilepsy.
- Noninvasive methods for lateralizing language dominance are highly valued.
Purpose of the Study:
- To assess the diagnostic utility of three expressive language disturbances for lateralizing language-dominant temporal lobe epilepsy (TLE).
- Investigated postictal language delay (PILD), postictal phonemic paraphasic errors (PostPE), and interictal phonemic paraphasic errors (InterPE).
Main Methods:
- Sixty patients with surgically confirmed TLE underwent video/EEG monitoring.
- Evaluated PILD, PostPE, and InterPE using logistic regression and ROC analysis.
- Calculated sensitivity, specificity, and predictive values for each method.
Main Results:
- PILD, PostPE, and InterPE demonstrated comparable accuracy in lateralizing seizure onset.
- Patients with dominant TLE showed longer PILD and higher rates of PostPE and InterPE.
- Individual sensitivities/specificities: PILD (84%/86%), PostPE (94%/64%), InterPE (97%/86%).
Conclusions:
- Interictal language testing is as effective as postictal testing for predicting dominant TLE lateralization.
- The quality of language errors during both interictal and postictal periods is clinically significant.
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