Artifactual Signal Detection Using Intraoperative Electrocorticographic Devices During Functional Brain Mapping Of Brain Tumors
Abstract number :
2.182
Submission category :
3. Neurophysiology / 3C. Other Clinical EEG
Year :
2025
Submission ID :
1168
Source :
www.aesnet.org
Presentation date :
12/7/2025 12:00:00 AM
Published date :
Authors :
Presenting Author: William Tatum, DO – Mayo Clinic in Florida
Adrian Safa, MD – Mayo Clinic Florida
Erik Middlebrook, MD – Mayo clinic Florida
Anteneh Feyissa, MD – Mayo Clinic Florida
David Sabsevitz, PhD – Mayo Clinic - Florida
Alicia Kissinger-Knox, PhD – Mayo clinic Florida
Phillip Gauthier, MSN – Mayo clinic Florida
Dawn Radford, D.O – Mayo clinic Florida
Anahita Jafari, MD – Mayo clinic Florida
Marco Failla Mulone, MD – Mayo clinic Florida
Sanjeet Grewal, MD – Mayo clinic Florida
Chaichana Kaisorn, MD – Mayo clinic Florida
Alfredo Quinones-Hinojosa, MD – Mayo clinic Florida
Brin Freund, MD – Mayo Clinic in Florida
Rationale: To compare the signal detection performance of a circular grid versus a strip electrode during intraoperative electrocorticography (iECoG) for Functional Brain Mapping (FBM).
Methods: We performed a single center retrospective evaluation of signal detection by recording intraoperative ECoG comparing two intraoperative recording devices and techniques during awake craniotomy for FBM. A circular grid and linear strip evaluated stimulation artifact, after discharges (ADs) , and epileptiform activity.
Results: 142 patients (83 female; mean 50.8 years) underwent awake craniotomy with reoperation in 26 (18.3%) using iECoG. 109 (76.8%) underwent direct electrical stimulation for FBM with a total of 71 strip and 71 circle circular grids monitoring iECoG. Max and min Signal amplitudes were higher with the circular grid (p < 0.01). The minimum (2.3 vs 2.8) and maximum (4.9 vs 6.3) current (mA) to produce visible stimulation artifact were lower with the circle grid indicating the superiority of technique (p < 0.01). Physiological signals represented by ADs were more frequently detected with the circular grid (182 vs. 82, p = 0.004) and involved more electrodes (5.06 vs. 0.95, p < 0.001).
Neurophysiology