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Usefulness of Direct Cortical Stimulation During Intraoperative Monitoring in Patients with Brain Tumor Near Motor Cortex: Case Report
Korean J Clin Lab Sci 2018;50:211-215  
Published on June 30, 2018
Copyright © 2018 Korean Society for Clinical Laboratory Science.

Sung-Hyuk Lim, Sang-Ku Park, Dong-Jun Kim, Jae-Seung Baek, Chan-Woo Park

Department of Neurology, Samsung Medical Center, Seoul, Korea
Correspondence to: Sung-Hyuk Lim
Department of Neurology, Samsung Medical Center, 81 Irwon-ro, Gangnam-gu, Seoul 06351, Korea Tel: 82-2-3410-2737 Fax: 82-2-3410-2759 E-mail:
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The aim of this study was to preserve the corticospinal tract during surgery and assess more accurately the motor performance in brain tumor patients around the motor cortex. TceMEP is not entirely reliable, even though there has been no change in waveforms due to a mixture of false positive and false negative signals. For a more detailed examination, DCS was employed to selectively stimulate the motor cortex. In both cases, the indications could find the region to which the cortex was responsible, and constantly check and examine the changes in amplitude, thereby preserving the motor pathway and performing surgery. On the other hand, patients who did not implement the DCS but did implement the TceMEP experienced a decrease in their postoperative motor performance. DCS is a very useful examination and it is a method that can reduce the post-surgery disorder that may occur in patients with the TceMEP in brain tumor surgery.
Keywords : Direct cortical stimulation, Motor evoked potentials, Corticospinal tract

June 2018, 50 (2)
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