Presurgical Evaluation: Current Role of Invasive EEG

Our purpose was to review the current role of invasive and semi‐invasive EEG in the presurgical evaluation of candidates for epilepsy surgery. The use of stereotactically implanted intracranial depth (stereo‐EEG), subdural strip and grid, and foramen ovale electrodes, as well as intraoperative elect...

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Bibliographic Details
Published in:Epilepsia (Copenhagen) 2000-01, Vol.41 (s3), p.S55-S60
Main Authors: Zumsteg, Dominik, Wieser, Heinz Gregor
Format: Article
Language:English
Subjects:
Amobarbital
Amygdala - surgery
Brain - drug effects
Brain - physiopathology
Brain Mapping - methods
Carotid Artery, Internal
depth electrodes
Electrodes, Implanted
Electroencephalography - drug effects
Electroencephalography - methods
Electroencephalography - statistics & numerical data
Epidural Space
Epilepsy - diagnosis
Epilepsy - surgery
foramen ovale electrodes
Functional Laterality - drug effects
Functional Laterality - physiology
Hippocampus - surgery
Humans
Injections, Intra-Arterial
intraoperative electrocorticography
Memory - drug effects
Memory - physiology
Monitoring, Intraoperative
Presurgical evaluation
selective amygdalohippocampectomy
selective temporal lobe amobarbital memory tests
Sphenoid Bone
Stereotaxic Techniques
subdural strips and grids
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Summary:Our purpose was to review the current role of invasive and semi‐invasive EEG in the presurgical evaluation of candidates for epilepsy surgery. The use of stereotactically implanted intracranial depth (stereo‐EEG), subdural strip and grid, and foramen ovale electrodes, as well as intraoperative electrocorticography and electrical brain stimulation (“functional mapping”) at the Epilepsy Center University Hospital Zurich, from 1984 to 1998, is analyzed. Advantages and disadvantages of the various intracranial EEG techniques are critically discussed. Out of 422 selective amygdalohippocampectomies performed in Zurich, 54% had non‐invasive, 32% had semi‐invasive, and 14% had invasive presurgical EEG evaluation. Because patients currently referred to our center increasingly present with a complex history of disease, i.e., constitute so‐called “difficult cases”, there is trend to combine several invasive and semi‐invasive, pre‐ and intraoperative neurophysiological techniques.
ISSN:0013-9580
1528-1167
DOI:10.1111/j.1528-1157.2000.tb01535.x