Control study of magnetoencephalography and intraoperative cortical electrical stimulation based motor evoked potential monitoring for mapping motor cortex
Yang Kun
Zhang Yuhai
Yang Lu
Zhang Yansong
Yang Lunxian
Zou Yuanjie
Zhang Rui
Liu Hongyi
Abstract：Objective To evaluate the accuracy of preoperative primary motor cortex (M1) mapping with magnetoencephalography (MEG). Methods Twenty-six consecutive patients with glioma in the central region were selected. Motor cortex was located by MEG preoperatively, and its results were overlaid on the MRI, then the activated regions located under neuronavigation. Intraoperative direct cortical electrical stimulation (DCES) was performed in patients located successfully by MEG, and the coincidence rate was calculated between MEG and DCES techniques. Results MEG mapping failed in 2 patients because of the problems of patients, and succeeded in other 24 patients with 1 to 5 activated regions in every patient. DCES was performed in 24 patients with 41 targets, including 24 positive targets, one target in every patient. For the analysis of all the 41 targets, the coincidence rate was 58.5%in mapping M1 between MEG and DCES. For the analysis of 27 targets in MEG activated regions of M1 in group 1 and central region in group 2 at the lesion side, the coincidence rate of the two techniques was 88.9%. For the analysis of 17 targets in MEG activated regions of M1 in group 1 at the lesion side, the coincidence rate of the two techniques was 100%. Conclusion MEG can locate M1 sensitively and reliably, and can be used for the preoperative planning in patients with glioma in the central region.
Keywords：gliomamagnetoencephalographyevoked potentialsmotorcortical electric stimulation
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 292-295 )