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视动性眼震的分析是检查前庭-动眼系统功能的最重要方法之一,在日本已用来分析脑干功能。视动性眼震的慢相由物象的运动引起,故它们的方向一致。快相则为动眼系统的反射,故与物象运动的方向相反。异常的视动性眼震为:(1)外周性前庭病变的视动性眼震可增强自发性眼震方向,抑制其相反方向,功能单侧性减退者显示病例减弱、健侧增强,视动性眼震的优势偏向健侧。(2)小脑或脑干病变的优势偏向健侧。(3)先天性眼震者的视动性眼震无反应或出现逆向。(4)病变涉及大脑皮层或皮层下区的视动性眼震的优势偏向患侧。本文报导了经过CT扫描排除了外周性功能病变、亦无自发性眼震的单侧大脑半球病变30例。
Optic nystagmus analysis is one of the most important methods of examining the function of the vestibular-ocular system and has been used in Japan to analyze brainstem function. The slow phase of optokinetic nystagmus caused by the movement of objects, so their direction. Fast phase is the reflection of the moving eye system, so the opposite direction with the object movement. Unusual optokinetic nystagmus: (1) Optic nystagmus of peripheral vestibular lesions can enhance the spontaneous nystagmus direction, inhibit the opposite direction, decreased unilateral function showed cases of weakening, contralateral enhancement, depending on The advantages of dynamic nystagmus tend to be contralateral. (2) The advantages of cerebellar or brainstem lesions tend to be contralateral. (3) Optic nystagmus of congenital nystagmus no reaction or reverse. (4) The prevalence of optokinetic nystagmus involving the cerebral cortex or subcortical region of the lesion favors the affected side. This article reports 30 cases of unilateral hemispheric lesions after exclusion of peripheral function lesions and no spontaneous nystagmus after CT scan.