VISUAL EVOKED POTENTIALS IN CLINICAL NEUROLOGY AND NEURO-OPHTHALMOLOGY

正常人从视觉诱发电位到棋盘图形的研究 志愿者和患有各种神经疾病的患者，特别是 多发性硬化症和癫痫。 多发性硬化症：主要阳性峰的延长有 在有视神经炎病史的患者中和在 有些患者甚至没有这样的病史。在一些患者中， 多年来一直无视觉症状的视神经炎病史 然而，潜伏期的持续延长或正常化 已经被注意到了。 B.癫痫发作：视觉诱发电位为半视野 刺激(研究视后通路)已经被研究过了。 在复杂的部分性癫痫患者中。主要目标是预测 视觉诱发电位检测癫痫灶的一侧。这个 6名患者的初步分析显示没有明确的可预测性。 C.其他神经疾病：视觉诱发电位研究于 一位患有阵发性体温过低的夏皮罗综合征患者。当 体温下降到33-34摄氏度，这是主要的 阳性峰明显延长，而正常人 温度(35-36摄氏度)，潜伏期正常。 视觉诱发电位的意义在于它们 是完全非侵入性的，在检测隐匿性病变和 在皮质神经系统的背景下评估视觉系统 正直。

Visual evoked potentials to checkerboard pattern were studies in normal volunteers and patients with various neurological disorders, particularly multiple sclerosis and seizures. A. Multiple Sclerosis: The prolongation of the major positive peak has been consistently found in patients with history of optic neuritis and in some patients even without such a history. In some patients with the history of optic neuritis who have been visually asymptomatic for many years, however, persistent prolongation or normalization of the latency has been noted. B. Epileptic Seizures: Visual evoked potentials to be a half-visual field stimulation (studying the retrodiasmatic visual pathway) have been studied in patients with complex partial seizures. The primary goal is to predict the side of the epileptic lesion by the visual evoked potentials. The preliminary analysis in 6 patients showed no clear-cut predictability. C. Other Neurological Disorders: Visual evoked potentials were studied in a patient with Shapiro syndrome who has paroxysmal hypothermia. When the body temperature dropped to 33-34 degrees C, the latency of the major positive peak was significantly prolonged, whereas with normal body temperature (35-36 degrees C), the latencies were normal. The significance of the visual evoked potentials lies in the fact that they are totally noninvasive, are useful in detecting the occult lesions and in evaluating the visual system in the context of the cortical nervous system integrity.