Ictal recordings of ambulatory cassette EEG with sphenoidal electrodes in temporal lobe epilepsy: comparison with intensive videomonitoring.
Seventy-three seizures in 18 epilepsy patients were studied by analyzing the ictal findings of 8-channel ambulatory EEG (A/EEG) and adjacent 16-channel intensive videomonitoring (IVM). With IVM and A/EEG analysis, accuracy was excellent for determining the lateralization of seizure progression; whereas at seizure onset and post-ictal slowing, accuracy was poor. No false lateralization was found in A/EEG compared with IVM or lateralization according to patient data, and in seizure lateralization the interpretation of A/EEG was discordant in only 3 seizures with IVM analysis. According to our study, ictal 8-channel A/EEG with sphenoidal electrodes is not suitable for localization of temporal lobe foci, but is reliable for lateralization analysis.
Tuunainen
A
A
Vaajasalo Hospital, Department of Clinical Neurophysiology, Kuopio, Finland.
Nousiainen
U
U
D000328:Adult; D001927:Brain Diseases / Q000150:complications / Q000175:diagnosis / Q000503:physiopathology*; D004566:Electrodes / Q000706:statistics & numerical data*; D004569:Electroencephalography / Q000379:methods*; D004827:Epilepsy / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008875:Middle Aged; D012640:Seizures / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D013702:Temporal Lobe / Q000503:physiopathology*