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KMID : 1101420190510020198
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Korean Journal of Clinical Laboratory Science
2019 Volume.51 No. 2 p.198 ~ p.204
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Evoked Potentials before the Intractable Epilepsy Surgery
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Lim Sung-Hyuk
Park Sang-Ku
Baek Jae-Seung
Kim Kab-Kyu
Kim Ki-Eob
Lee Yu-Ji
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Abstract
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Various treatments can be attempted in patients with intractable epilepsy, in whom the symptoms of seizures are not controlled by various drugs. On the other hand, in patients requiring a surgical method, a preoperative examination is needed to determine the portion of seizure site to be resected. Electrodes are inserted into the cerebral cortex for accurate lesion measurements and safe operation. The electrodes inserted in the cortex not only record the electroencephalography (EEG), but also allow various tests to confirm the function of the part. One of these methods is the evoked potential test. From January 2015 to December 2018, the trends of measured waveforms in were analyzed 70 patients. The somatosensory evoked potential (SSEP) recorded on the electrode inserted in the cerebral cortex can be searched for the pathway of the central sulcus to avoid the primary motor area and primary sensory area. In addition, using the middle latency auditory evoked potentials (MLAEP) and flash visual evoked potentials (FVEP), the functional cortex in the auditory cortex and the visual cortex were compared with the seizure focus point on the EEG to help determine the location of the ablation and minimize functional impairment after surgery.
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KEYWORD
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Evoked potential, Epilepsy surgery, MLAEP, SSEP, VEP
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