Quantitative Signal Characteristics of Electrocorticography and Stereoelectroencephalography: The Effect of Contact Depth
| Autor: | Nathalie Jette, Fedor Panov, Lara V. Marcuse, Saadi Ghatan, Ji Yeoun Yoo, James J. Young, Divaldo Camara, Joshua Friedman, Madeline C. Fields |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Drug Resistant Epilepsy Physiology Contact depth Computed tomography Signal 050105 experimental psychology Stereoelectroencephalography 03 medical and health sciences Young Adult 0302 clinical medicine Statistical criterion Epilepsy surgery Physiology (medical) Phase–amplitude coupling Medicine Humans 0501 psychology and cognitive sciences Electrocorticography Original Research Brain Mapping medicine.diagnostic_test business.industry 05 social sciences Brain Electroencephalography Neurology Stereoelectroencephalogaphy Spectral power ComputingMethodologies_DOCUMENTANDTEXTPROCESSING Female Neurology (clinical) Nuclear medicine business Subdural electrodes 030217 neurology & neurosurgery |
| Zdroj: | Journal of Clinical Neurophysiology |
| ISSN: | 1537-1603 0736-0258 |
| Popis: | Supplemental Digital Content is Available in the Text. Purpose: Patients undergoing epilepsy surgery often require invasive EEG, but few studies have examined the signal characteristics of contacts on the surface of the brain (electrocorticography, ECOG) versus depth contacts, used in stereoelectroencephalography (SEEG). As SEEG and ECOG have significant differences in complication rates, it is important to determine whether both modalities produce similar signals for analysis, to ultimately guide management of medically intractable epilepsy. Methods: Twenty-seven patients who underwent SEEG (19), ECOG (6), or both (2) were analyzed for quantitative measures of activity including spectral power and phase–amplitude coupling during approximately 1 hour of wakefulness. The position of the contacts was calculated by coregistering the postoperative computed tomography with a reconstructed preoperative MRI. Using two types of referencing schemes—local versus common average reference—the brain regions where any quantitative measure differed systematically with contact depth were established. Results: Using even the most permissive statistical criterion, few quantitative measures were significantly correlated with contact depth in either ECOG or SEEG contacts. The factors that predicted changes in spectral power and phase–amplitude coupling with contact depth were failing to baseline correct spectral power measures, use of a local rather than common average reference, using baseline correction for phase–amplitude coupling measures, and proximity of other grey matter structures near the region where the contact was located. Conclusions: The signals recorded by ECOG and SEEG have very similar spectral power and phase–amplitude coupling, suggesting that both modalities are comparable from an electrodiagnostic standpoint in delineation of the epileptogenic network. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|