Magnetoencephalography in fronto-parietal opercular epilepsy.
Yosuke Kakisaka1, Masaki Iwasaki, Andreas V Alexopoulos
1Epilepsy Center, Neurological Institute, Cleveland Clinic, Cleveland, OH 44195, USA. kakisuke@mui.biglobe.ne.jp
Magnetoencephalography (MEG) effectively detects epileptic spikes in the fronto-parietal opercular cortex when scalp electroencephalography (EEG) cannot. This aids in diagnosing opercular epilepsy, even with non-diagnostic EEG.
Area of Science:
- Neuroscience
- Epileptology
- Medical Imaging
Background:
- Fronto-parietal opercular epilepsy presents diagnostic challenges.
- Scalp electroencephalography (EEG) may fail to detect epileptic spikes in this region.
Observation:
- Four patients with suspected opercular epilepsy had spikes detected only by magnetoencephalography (MEG).
- Seizure semiology indicated opercular and peri-rolandic cortex involvement.
- MEG successfully localized spikes to the fronto-parietal operculum.
Findings:
- MEG identified spikes missed by scalp EEG in all four patients.
- Invasive recordings confirmed spike origin in the MEG-localized area for three patients.
- Surgical resection led to seizure freedom in two patients.
Implications:
- MEG is valuable for localizing epileptic activity in the fronto-parietal operculum.
- MEG can aid diagnosis in suspected opercular epilepsy cases with non-diagnostic EEG.
- This highlights MEG's role in identifying otherwise occult epileptogenic zones.
More Related Videos
09:57Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
Published on: September 20, 2024
09:00Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex
Published on: April 15, 2015