Related Experiment Video
Updated: Mar 31, 2026
Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
Published on: December 18, 2016
The causal epileptic network identifies the primary epileptogenic zone in Lennox-Gastaut syndrome
Yun Jung Hur1, Heung Dong Kim2
1Department of Pediatrics, Haeundae Paik Hospital, Inje University College of Medicine, Pusan, Republic of Korea.
Purpose:
Lennox-Gastaut syndrome (LGS) can be successfully treated by resective surgery in patients with a primary epileptogenic zone. This study aimed to identify the primary epileptogenic zone based on the causal epileptic network using direct directed transfer function (dDTF) analysis.
Methods:
We reviewed the dDTF findings for generalized sharp and wave discharges (GSW) from the preoperative electroencephalography (EEG) of 12 LGS patients (group A) with unilateral focal pathology who were successfully treated with resective surgery. These findings were compared with preoperative dDTF findings for the GSW from 15 LGS patients with bilateral non-resectable pathology (group B) who exhibited persistent bilateral independent diffuse sharp and wave discharges, even after corpus callosotomy.
Results:
The dDTF analysis of the GSW revealed concordant findings of localization or lateralization with the primary epileptogenic zone in 83.3% (10/12 cases) of group A patients and bilateral or multifocal localization in 93.3% (14/15) of group B patients (p<0.01). The regions identified by dDTF analysis were included in the resected areas of all patients in group A, and complete matches of the resected areas without other foci were observed in 7 patients (58.3%) in group A. The region of GSW most frequently identified by dDTF analysis was the frontal area, which was identified in 91.7% (11/12) of group A and in 100% of group B, while extra-frontal areas were identified in 36.1% and 24.5% of groups A and B, respectively.
Conclusions:
The dDTF analysis of GSW could provide additional information to identify resective surgery candidates for patients with LGS.
More Related Videos
09:57Author Spotlight: Advancing Pediatric Epilepsy Surgery in Children Through Novel Biomarkers and Enhanced Localization
Published on: September 20, 2024
10:22Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
Published on: December 6, 2016
Related Concept Videos
01:24Epilepsy and Seizures: Overview
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
01:13Seizures: Classification
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
01:18Antiepileptic Drugs: GABAergic Pathway Potentiators
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for...
01:14Antiepileptic Drugs: Glutamate Antagonists
01:17Antiepileptic Drugs: Calcium Channel Blockers
Calcium channel blockers exert their antiepileptic effects by targeting T-type calcium channels, which are integral to transmitting nerve signals in the central nervous system. These channels allow the passage of calcium ions, which are vital for neuronal communication. By inhibiting T-type calcium channels, calcium channel blockers effectively reduce the release of neurotransmitters and...
01:20Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...