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EEG/functional MRI in epilepsy: The Queen Square Experience
Khalid Hamandi1, Afraim Salek-Haddadi, David R Fish
1Department of Clinical and Experimental Epilepsy, Institute of Neurology, University College London, Queen Square, London, United Kingdom.
Summary
Simultaneous electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) non-invasively maps brain function. This technique aids in localizing epilepsy, offering insights into neurobiology and pre-surgical planning.
Area of Science:
- Neuroscience
- Medical Imaging
- Clinical Neurology
Background:
- Simultaneous electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) offers novel insights into brain research.
- Technological challenges of recording EEG within MRI scanners have been overcome, enabling high-quality data acquisition.
- Initial applications focused on epilepsy, expanding to studies of normal brain rhythms and evoked responses.
Purpose of the Study:
- To review the technical aspects of recording EEG during fMRI.
- To explore the application of EEG/fMRI in studying patients with epilepsy.
- To highlight the potential clinical utility of EEG/fMRI in epilepsy management.
Main Methods:
- Simultaneous recording of EEG and fMRI data.
- Analysis of electrophysiological activity and hemodynamic correlates.
- Application in patient cohorts with epilepsy and healthy subjects.
Main Results:
- EEG/fMRI successfully maps brain areas associated with epileptiform discharges.
- Demonstrated ability to localize the generation of EEG abnormalities in epilepsy patients.
- Provided a greater understanding of the neurobiology of interictal epileptiform discharges.
Conclusions:
- EEG/fMRI is a powerful non-invasive tool for mapping brain function in both normal and pathological states.
- EEG/fMRI offers significant potential for pre-surgical localization in epilepsy patients.
- This technique enhances our understanding of epilepsy's neurobiology and clinical presentation.