Comparison of depth and subdural electrodes in recording temporal lobe seizures.

Abstract:

:Intracranial EEG recording is often required to identify an area of the brain for resective surgery for intractable epilepsy. We simultaneously compared bilaterally placed depth and limited subdural electrode EEG to determine the most effective method of recording seizures from the temporal lobes. Localized complex partial seizures usually appeared earlier in hippocampal depth electrodes and spread later to subdural recording sites. In 3 patients, hippocampal recordings showed localized seizure origin but subdural recording was nonlocalizing due to rapid bilateral seizure propagation. In 1 patient with nonlocalized seizures presumably of extratemporal origin, subdural electrodes incorrectly lateralized seizure origin to a temporal lobe. Auras and subclinical seizures detected by depth electrode recording were often not evident with subdural electrodes. We conclude that EEG recording with hippocampal depth electrodes correctly identifies and lateralizes temporal lobe seizures more often than with limited subdural electrodes.

journal_name

Neurology

journal_title

Neurology

authors

Sperling MR,O'Connor MJ

doi

10.1212/wnl.39.11.1497

subject

Has Abstract

pub_date

1989-11-01 00:00:00

pages

1497-504

issue

11

eissn

0028-3878

issn

1526-632X

journal_volume

39

pub_type

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