• Annals of Clinical Neurophysiology
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• 제8권1호
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• pp.81-83
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• 2006

Periodic lateralized epileptiform discharges(PLEDs) are usually seen in acute and subacute cerebral lesions. Occasionally PLEDs could be observed in persistent structural lesions. We observed PLEDs-plus in a patient with right basal ganglionic hemorrhage, at 10 months and 13 months after the stroke. The patients suffered two seizures 3 months and 5 days before recording of EEG. PLEDs-plus may persist as an interictal abnormal finding and the rhythmic discharge of that may be increased by a seizure.

• Clinical and Experimental Pediatrics
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• 제63권3호
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• pp.88-95
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• 2020

Accurate localization of the seizure onset zone is important for better seizure outcomes and preventing deficits following epilepsy surgery. Recent advances in neuroimaging techniques have increased our understanding of the underlying etiology and improved our ability to noninvasively identify the seizure onset zone. Using epilepsy-specific magnetic resonance imaging (MRI) protocols, structural MRI allows better detection of the seizure onset zone, particularly when it is interpreted by experienced neuroradiologists. Ultra-high-field imaging and postprocessing analysis with automated machine learning algorithms can detect subtle structural abnormalities in MRI-negative patients. Tractography derived from diffusion tensor imaging can delineate white matter connections associated with epilepsy or eloquent function, thus, preventing deficits after epilepsy surgery. Arterial spin-labeling perfusion MRI, simultaneous electroencephalography (EEG)-functional MRI (fMRI), and magnetoencephalography (MEG) are noinvasive imaging modalities that can be used to localize the epileptogenic foci and assist in planning epilepsy surgery with positron emission tomography, ictal single-photon emission computed tomography, and intracranial EEG monitoring. MEG and fMRI can localize and lateralize the area of the cortex that is essential for language, motor, and memory function and identify its relationship with planned surgical resection sites to reduce the risk of neurological impairments. These advanced structural and functional imaging modalities can be combined with postprocessing methods to better understand the epileptic network and obtain valuable clinical information for predicting long-term outcomes in pediatric epilepsy.

• Journal of Korean Neurosurgical Society
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• 제67권6호
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• pp.661-674
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• 2024

Objective : Stereoelectroencephalography (SEEG) is increasingly being recognized as an important invasive modality for presurgical evaluation of epilepsy. This study focuses on the clinical and technical considerations of SEEG investigations when using conventional frame-based stereotaxy, drawing on institutional experience and a comprehensive review of relevant literature. Methods : This retrospective observational study encompassed the surgical implantation of 201 SEEG electrodes in 16 epilepsy patients using a frame-based stereotactic instrument at a single tertiary-level center. We provide detailed descriptions of the operative procedures and technical nuances for bilateral and multiple SEEG insertions, along with several illustrative cases. Additionally, we present a literature review on the technical aspects of the SEEG procedure, discussing its clinical implications and potential risks. Results : Frame-based SEEG electrode placements were successfully performed through sagittal arc application, with the majority (81.2%) of cases being bilateral and involving up to 18 electrodes in a single operation. The median skin-to-skin operation time was 162 minutes (interquartile range [IQR], 145-200), with a median of 13 minutes (IQR, 12-15) per electrode placement for time efficiency. There were two occurrences (1.0%) of electrode misplacement and one instance (0.5%) of a postoperative complication, which manifested as a delayed intraparenchymal hemorrhage. Following SEEG investigation, 11 patients proceeded with surgical intervention, resulting in favorable seizure outcomes for nine (81.8%) and complete remission for eight cases (72.7%). Conclusion : Conventional frame-based stereotactic techniques remain a reliable and effective option for bilateral and multiple SEEG electrode placements. While SEEG is a suitable approach for selected patients who are strong candidates for epilepsy surgery, it is important to remain vigilant concerning the potential risks of electrode misplacement and hemorrhagic complications.

• Clinical and Experimental Pediatrics
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• 제48권12호
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• pp.1342-1347
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• 2005

목 적 : 신생아의 가장 흔한 신경학적 증상은 경련이다. 뇌는 아직 미숙한 상태로 이 시기의 경련은 경련 자체로도 높은 사망률을 보이고 심각하고 영구적인 후유증을 초래할 수 있기 때문에 경련을 조기에 진단하고 원인을 찾아내고 적절한 치료를 조속히 시행하는 것이 매우 중요하다. 신생아 경련은 소아나 성인의 경련과 여러 가지 차이점이 있는데, 특히 지속성 신생아 경련에서의 원인, 형태, 예후 등에 대하여 알아보고자 한다. 방 법 : 1998년 7월부터 2003년 6월까지 인하대학교병원 신생아집중치료실에 입원한 신생아 중 지속성 경련을 보인 36명을 대상으로, 경련이 발생한 시기, 원인, 경련형태, 지속시간, 뇌파, 예후를 기록지를 통하여 후향적으로 분석하였다. 결 과 : 대상환아의 남녀비는 1.1 : 1이었고, 재태기간은 $37.0{\pm}3.6$주, 체중 $2.70{\pm}0.82kg$, 경련은 생후 2일(평균 중앙값)에 발생하였다. 원인질환은 미숙아에서는 저산소성 허혈성 뇌증(50.0%), 뇌출혈(33.3%), 만삭아에서는 특발성(37.5%), 저산소성 허혈성 뇌증(29.2%) 순이었다. 뇌출혈은 미숙아에서 의미있게 높았다(P=0.034). 경련의 형태는 비정형적, 전신 강직, 다소성 근간대성 순으로 많았다. 전신 강직 형태일수록 사망 및 신경학적 후유증이 많았고(P<0.05), 비정형적 경련은 정상이 많았다(P<0.05). 경련의 발생시기는 생후 1일에 25.0%(9례)였으며 생후 2일 이내에 52.7%(19례), 생후 7일 이내에 80.5%(29례)에서 발생하였다. 미숙아와 만삭아 모두 생후 3일 이후에 발생한 경우 예후가 좋았다(P=0.016). 경련의 지속시간은 30분-1시간이 19례(52.8%)로 가장 많았지만, 지속시간이 1시간 이상일수록 신경학적인 후유증이 많이 발생하였다(P=0.002). 출생체중이 1,000 g 이하에서는 전부 사망하였지만, 체중 및 재태기간은 예후와 관련성이 적었다. 뇌파에서 전신성 강직 발작은 주로 심한 배경파 억제나 전기적 경련으로, 비정형적 경련은 주로 정상소견을 보였다(P<0.05). 결 론 : 지속성 신생아 경련에서 재태기간과 체중은 예후와 관련성이 적었지만, 경련발생시기가 빠를수록, 경련 지속시간이 길수록, 전신성 강직 형태의 경련일수록 나쁜 예후를 보였다.