GRAPHIC REPRESENTATION OF THE EEG DURING EPILEPTIC SEIZURES
GRAPHIC REPRESENTATION OF THE EEG DURING EPILEPTIC SEIZURES
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DOI：
10.1016/0013-4694(93)90020-v
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发表时间：
1993-10-01
期刊：
影响因子：
--
通讯作者：
FARINE, B
中科院分区：
文献类型：
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作者：
GOTMAN, J;LEVTOVA, V;FARINE, B
在逐渐开始的癫痫发作中，需要仔细检查背景以确定发作的时间和区域。我们提出了一种方法来显示癫痫发作的特征EEG变量：幅度和平均频率的变化相比，背景。对于每个EEG通道，这些变量以地形图方式显示，使得可以在标准屏幕上查看1或2分钟的EEG，从而表示发作前和发作期。我们通过比较传统EEG和显示器指示的癫痫发作的时间和区域，评估了该显示器指示癫痫发作的能力。对30次头皮记录癫痫发作和49次深度记录癫痫发作进行了比较。癫痫发作被选择为具有逐渐发作，没有或最小的伪影。从传统的脑电图和计算机的方法，独立检查，发作时间一致（在3秒内）在77%的头皮癫痫发作和63%的深度癫痫发作。在14%的癫痫发作中，计算机显示器显示的发作时间比目视检查早3秒以上;然而，在复查时，认为这种发作可能是正确的。这种定量显示，在实践中应使用传统的脑电图，因此可能是有用的计算机辅助癫痫发作的解释和癫痫发作的浓缩表示。
In seizures starting gradually, careful examination of the background is required to determine the time and region of onset. We propose a method for displaying EEG variables which characterize seizure onset: changes in amplitude and in average frequency compared to background. These variables are displayed topographically for each EEG channel so that 1 or 2 min of EEG may be viewed on a standard screen, thus representing pre-ictal and ictal periods. We evaluated the ability of this display to indicate seizure onset, by comparing the times and regions of seizure onset indicated by traditional EEG and by the display. The comparison was performed on 30 seizures from scalp recordings and 49 seizures from depth recordings. Seizures were selected for having a gradual onset with no or minimal artefact. Onset times from traditional EEG and the computer method, examined independently, coincided (within 3 sec) in 77% of scalp seizures and 63% of depth seizures. In 14% of seizures the computer display indicated an onset more than 3 sec earlier than visual examination; upon reexamination, however, this onset was thought to be possibly correct. This quantitative display, which in practice should be used with traditional EEG, may thus be useful for computer-assisted seizure interpretation and for a condensed representation of seizures.