Computer Analysis of Electroencephalogram in Clinical Veterinary Medicine.

脑电图的临床应用是兽医学中发展较好的一门学科，而频率分析（频谱分析）和地形图绘制技术在临床界也越来越受欢迎。这两种分析方法在40例自发性神经疾病患者中进行了前瞻性研究，以观察这些测试是否有助于发现异常。9例癫痫患者中有6例出现异常。功率谱分析使4只脑积水犬的大部分慢波是定量的。去同步被认为是双极导联功率的增加。在神经系统患者中，频率分析显示总功率显著增加。地形图测试提示，癫痫、脑积水、癫痫发作、视力障碍和吻合不全的动物呈弥漫性高密度分布。在癫痫、乳房腺瘤、癫痫发作和头部倾斜的患者中，可以识别出慢频率成分的定位或不对称。在15例17只神经障碍动物中，地形分布被判断为异常模式。综上所述，通过频谱分析的脑电图量化是可能的，而通过地形分析的可视化可以准确地预测低频成分的偏侧性或局部性。因此，频率分析和地形测绘是临床兽医脑电图评估的有效方法，因为这些分析使脑电图的估计变得容易。此后，这些测试与其他解剖检查相结合的价值有所提高，尽管在解释这些测试时需要相当小心地识别伪影和正常脑电图变异。

Clinical application of electroencephaolgraphy is a well-developed discipline in veterinary medicine, and frequency analysis (spectral analysis) and topographic mapping are techniques gaining popularity in the clinical community. Both analysis were studied prospectively in 40 patients with spontaneous neurologic disease to see if those tests could help find the abnormality. 6 of 9 patients with epilepsy showed the abnormal spectral patterns compared with normal spectrum. Power spectral analysis made a majority of slow wave to be quantitative in four dogs with hydrocephalus. Desynchronization was recognized as increase of power in bipolar leads. In neurologic patients, significant increase in total power were showed by frequency analysis. Topographic mapping tests suggest diffusal high density distribution from animals with epilepsy, hydrocephalus, seizure, visual dysfunction, and ananastasia. Localizations or asymmetries of slow frequency components were identified were recognized in patients with epilepsy, mastadenoma, seizure, and head tilt. In 15 cases of 17 animals with neurologic disorders, topographic distributions were judged as abnormal patterns. Overall, it was thought that electroencephalography quantitazation by spectral analysis might be possible and visualization by topographic analysis could accurately predict the laterality or localization in low frequency components. So, frequency analysis and topographic mapping were useful technique to evaluate electroencephalography in clinical veterinary medicine, because those analysis made the estimation of electroencephalography easy. Hereafter, valuability of those tests was rised in combination with the other anatomical examinations, though considerable care needs to be taken to identify artifacts and normal electroencephalography variants when interpreting these tests.