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Sphenoidal electrode insertion under local analgesia in children
Insights
Sphenoidal electrodes in children allow for better study of the temporal lobe and hippocampal area. This technique aids in localizing complex seizures, improving diagnosis and surgical candidate selection for epilepsy.
Area of Science:
- Pediatric Neurology
- Epileptology
- Neurosurgery
Background:
- Standard extracranial EEG electrodes have limitations in studying the hippocampal area.
- Complex seizures originating in the temporal lobe can be difficult to localize with surface recordings alone.
Purpose of the Study:
- To evaluate the indications and results of sphenoidal electrode insertion under local analgesia in children.
- To assess the utility of sphenoidal electrodes for localizing temporal lobe seizures.
Main Methods:
- Insertion of sphenoidal electrodes under local analgesia in pediatric patients.
- Analysis of EEG data to identify seizure origins and characteristics.
Main Results:
- Sphenoidal electrodes enable study of the hippocampal area, inaccessible to other extracranial methods.
- This technique successfully localized complex seizures with subtle or absent surface EEG events, including those with temporal, frontotemporal, or bilateral temporal spikes.
- Sphenoidal electrodes facilitated identification and localization of temporal seizures.
Conclusions:
- Sphenoidal electrode insertion under local analgesia is an effective method for evaluating pediatric epilepsy.
- This technique improves the localization of temporal lobe seizures, guiding further diagnostic workup and patient selection for epilepsy surgery.
Abstract:
The indications for method and the results of sphenoidal electrode insertion under local analgesia are evaluated in children. This technique makes it possible to study the hippocampal area, which cannot be studied by other extracranial electrodes. It also localizes in a temporal lobe some complex seizures without electrical events on surface recordings, complex seizures with bilateral temporal spikes or a frontotemporal focus of spikes, as well as those with a temporal focus with bilateral synchronous spikes in standard EEG. Therefore, sphenoidal electrodes inserted without heavy general analgesia enable temporal seizures to be identified and localized, leading to more specific neuroradiological and neurophysiological explorations and helping in this way to select possible patients for epileptic surgery.