RT Journal Article
SR Electronic
T1 Comparison of depth and subdural electrodes in recording temporal lobe seizures
JF Neurology
JO Neurology
FD Lippincott Williams & Wilkins
SP 1497
OP 1497
DO 10.1212/WNL.39.11.1497
VO 39
IS 11
A1 Michael R. Sperling
A1 Michael J. O'Connor
YR 1989
UL http://n.neurology.org/content/39/11/1497.abstract
AB 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.