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眼震电图是应用眼震电图仪记录眼球运动时眼球周围电场变化的图像。眼球是一个双极性的球体,角膜相对于视网膜呈正电位,视网膜相对于角膜呈负电位,两者构成一电位差轴。当眼球处于正视位置时角膜与视网膜电位差约为1mV,并在头面部形成一电场,此电场在眼球运动时发生空间相位改变,于眼球两侧皮肤处各放一电极,在两极间可引出一电压值。可用生物电放大的原球加以放大,再以图像的方式记录下来,这就是眼震电图,它反映了眼球位置的改变。内眼观察眼震受到较大的限制,且难以定量分析,1955年Henriksson设计了专门的电子眼震电图机,并使之应用于临床。现时眼震电图是神经系统定位诊断的重要手段之一,据统计比肉眼发现眼震多近10倍左右。
Electronystagmography is the application of electronystagmography to record eye movements when the electric field around the image changes. The eyeball is a bipolar sphere, the cornea has a positive potential relative to the retina, the retina has a negative potential relative to the cornea, and both constitute a potential difference axis. When the eye is in the frontal position cornea and retina potential difference of about 1mV, and in the head and face to form an electric field, the electric field in the eye movement occurs when the phase space changes in the eye on both sides of the skin at each place an electrode between the poles can lead A voltage value. Available bio-electric amplification of the original ball to be enlarged, and then recorded as an image, this is the oculogram, which reflects the change of eye position. Nystagmus in the inner eye was greatly limited and difficult to quantify. In 1955, Henriksson designed a special electro-ocular electrogrammetry machine and applied it to the clinic. At present, nystagmus is one of the important means for the diagnosis and localization of nervous system. According to the statistics, nystagmus is about 10 times more than the naked eye.