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Focal suppression-burst on electrocorticography after temporal lobectomy
1Comprehensive Epilepsy Center, New York Hospital-Cornell Medical Center, New York 10021, USA.
Neurology
|December 1, 1995
Summary
Focal suppression-burst (S-B) on postresection electrocorticography (ECoG) in epilepsy surgery patients was not linked to adverse outcomes. Most patients with this finding achieved seizure freedom without significant neurological deficits.
Area of Science:
- Neurosurgery
- Epileptology
- Neurophysiology
Background:
- Cortical resections are performed for epilepsy treatment.
- Intraoperative electrocorticography (ECoG) assesses brain activity during surgery.
- Suppression-burst (S-B) patterns on ECoG may indicate cortical damage.
Purpose of the Study:
- To investigate the clinical significance of focal suppression-burst (S-B) patterns detected by postresection intraoperative electrocorticography (ECoG) in patients undergoing epilepsy surgery.
- To determine if S-B patterns are associated with postoperative neurological deficits or long-term seizure control.
Main Methods:
- Analysis of intraoperative ECoG data from 40 patients with epilepsy undergoing cortical resections.
- Identification of patients exhibiting focal S-B patterns at resection margins.
- Long-term follow-up including seizure frequency assessment, neuropsychological testing, MRI, and scalp EEG.
Main Results:
- Three out of 40 patients showed focal S-B on postresection ECoG.
- Two of these three patients became seizure-free, and one experienced rare seizures at 18-24 months follow-up.
- No unexpected postoperative abnormalities were found on neuropsychological testing, MRI, or follow-up scalp EEGs.
Conclusions:
- Focal suppression-burst patterns on postresection ECoG, while suggestive of localized cortical damage, were not associated with significant postoperative deficits in this cohort.
- The presence of S-B near anterior temporal lobectomy resection margins did not preclude favorable seizure outcomes.