Language mapping using electrocorticography versus stereoelectroencephalography: A case series

Young, James J.; Coulehan, Kelly; Fields, Madeline; Yoo, Ji Yeoun; Marcuse, Lara; Panov, Fedor; Ghatan, Saadi; Bender, H. Allison

doi:10.1016/j.yebeh.2018.04.032

Cited by 23 publications

(14 citation statements)

References 14 publications

(22 reference statements)

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“…This method relies on a 3D representation of the epileptogenic zone (EZ) (Kahane et al, 2006), later conceptualized as an epileptogenic network (Bartolomei et al, 2017). The relevance of sEEG for language mapping using ECS has been questioned by some users of ECS with subdural grids (Young et al, 2018). These authors have argued that in contrast to sEEG, subdural grids or strips of circular electrodes placed at the surface of the brain, offered a wider and denser spatial coverage of the cortical surface in a given anatomical area.…”

Section: Historical Considerations Of Ecsmentioning

confidence: 99%

Language Mapping Using Stereo Electroencephalography: A Review and Expert Opinion

Aron

Jonas

Colnat-Coulbois

et al. 2021

Front. Hum. Neurosci.

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Stereo-electroencephalography (sEEG) is a method that uses stereotactically implanted depth electrodes for extra-operative mapping of epileptogenic and functional networks. sEEG derived functional mapping is achieved using electrical cortical stimulations (ECS) that are currently the gold standard for delineating eloquent cortex. As this stands true especially for primary cortices (e.g., visual, sensitive, motor, etc.), ECS applied to higher order brain areas determine more subtle behavioral responses. While anterior and posterior language areas in the dorsal language stream seem to share characteristics with primary cortices, basal temporal language area (BTLA) in the ventral temporal cortex (VTC) behaves as a highly associative cortex. After a short introduction and considerations about methodological aspects of ECS using sEEG, we review the sEEG language mapping literature in this perspective. We first establish the validity of this technique to map indispensable language cortices in the dorsal language stream. Second, we highlight the contrast between the growing empirical ECS experience and the lack of understanding regarding the fundamental mechanisms underlying ECS behavioral effects, especially concerning the dispensable language cortex in the VTC. Evidences for considering network architecture as determinant for ECS behavioral response complexities are discussed. Further, we address the importance of designing new research in network organization of language as this could enhance ECS ability to map interindividual variability, pathology driven reorganization, and ultimately identify network resilience markers in order to better predict post-operative language deficit. Finally, based on a whole body of available studies, we believe there is strong evidence to consider sEEG as a valid, safe and reliable method for defining eloquent language cortices although there have been no proper comparisons between surgical resections with or without extra-operative or intra-operative language mapping.

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Section: Historical Considerations Of Ecsmentioning

confidence: 99%

Language Mapping Using Stereo Electroencephalography: A Review and Expert Opinion

Aron

Jonas

Colnat-Coulbois

et al. 2021

Front. Hum. Neurosci.

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“…2,11 Direct electrical stimulation for mapping of eloquent cortex is usually performed using ECOG; however, there is some evidence to suggest that language mapping with SEEG gives concordant results to ECOG. 12…”

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confidence: 99%

Quantitative Signal Characteristics of Electrocorticography and Stereoelectroencephalography: The Effect of Contact Depth

Young¹,

Friedman²,

Panov

et al. 2019

Journal of Clinical Neurophysiology

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“…One case study of extraoperative SEEG language mapping vs. intraoperative mapping showed discordant results (41). In a more recent case series, Young et al demonstrated that SEEG may be equally as efficacious as ECoG in mapping language areas among a small cohort of 15 patients, resulting in safe resection or ablation in six cases (42). These findings are part of a small number of studies investigating the efficacy of SEEG ESM of language functions.…”

Section: Primary Clinical Outcome Metrics Derived From Seeg Stimulatimentioning

confidence: 99%

Stimulation Mapping Using Stereoelectroencephalography: Current and Future Directions

et al. 2020

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Electrical stimulation mapping (ESM) using stereoelectroencephalography (SEEG) is an essential component in the workup of surgical epilepsy. Since the initial application of ESM in the mid-1960s, it remains unparalleled in defining eloquent brain areas and delimiting seizure foci for the purposes of surgical planning. Here, we briefly review the current state of SEEG stimulation, with a focus on the techniques used for identifying the epileptogenic zone and eloquent cortex. We also summarize clinical data on the efficacy of SEEG stimulation in surgical outcomes and functional mapping. Finally, we briefly highlight future applications of SEEG ESM, including novel functional mapping approaches, identifying rare seizure semiologies, neurophysiologic investigations for understanding cognitive function, and its role in SEEG-guided radiofrequency thermal coagulation.

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Language mapping using electrocorticography versus stereoelectroencephalography: A case series

Cited by 23 publications

References 14 publications

Language Mapping Using Stereo Electroencephalography: A Review and Expert Opinion

Language Mapping Using Stereo Electroencephalography: A Review and Expert Opinion

Quantitative Signal Characteristics of Electrocorticography and Stereoelectroencephalography: The Effect of Contact Depth

Stimulation Mapping Using Stereoelectroencephalography: Current and Future Directions

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