Safran A B, Gauthier G, Safran E
J Fr Ophtalmol. 1983;6(6-7):581-7.
Electro-oculographic recordings of horizontal eye movements in two patients with dorso-mesencephalic lesions are analysed. Tracings shows essentially: (A) dysconjugate glissadic dysmetria, with adduction overshoot and abduction undershoot, and (B) instability of ocular fixation. Fixation instability consists of bursts of 2 or 3 bilateral to-and-fro eye movements, of 4 degree or less amplitude. During a burst there is no evident latency between successive ocular movements. Bursts often appear following horizontal refixation saccades, and are then repeated once or twice with regular intervals. In one patient, fixation instability phases are more often elicited by saccades to the right than to the left. The typical occurrence of fixation instability after the fast phase of optokinetic nystagmus is described. The alteration of ocular fixation described in our patients belongs to the general group of "saccadic intrusions" as defined by Daroff et al. (1977). Resemblance with "lightning eye movements" (Atkin and Bender, 1964) and "opposed adducting saccades" in the Sylvian aqueduct syndrome (Ochs et al., 1979) is discussed.
对两名患有中脑背侧病变患者的水平眼动电图记录进行了分析。描记图主要显示：(A) 共轭性滑囊炎性辨距不良，内收时过冲，外展时欠冲；(B) 眼球注视不稳定。注视不稳定表现为2次或3次双侧来回眼动爆发，幅度在4度或以下。在一次爆发期间，连续眼动之间没有明显的潜伏期。爆发常常出现在水平重新注视扫视之后，然后以规则的间隔重复一到两次。在一名患者中，注视不稳定阶段更常由向右的扫视而非向左的扫视引发。描述了视动性眼球震颤快相后典型的注视不稳定情况。我们患者中所描述的眼球注视改变属于Daroff等人（1977年）定义的“扫视侵入”这一总体类别。讨论了与“闪电眼动”（阿特金和本德，1964年）以及中脑导水管综合征中的“对侧内收性扫视”（奥克斯等人，1979年）的相似性。
