Girotti F, Cefalà A, Sghirlanzoni A, Savoiardo M, Avanzini G
Ital J Neurol Sci. 1980 Jun;1(3):139-48. doi: 10.1007/BF02335843.
An analysis of ocular movements was performed in four patients with retraction nystagmus and paralysis of the upward gaze. The clinical and radiological data indicate that the lesion were relatively limited to the most rostral and dorsal portion of the mesencephalon. The electrooculographic examination disclosed not otherwise obvious abnormalities of horizontal ocular movements. The most prominent defect was a tendency to perform hypometric saccades followed by multiple corrective movements. This tendency was particularly evident in saccadic movements toward a light spot unexpectedly displaced in the visual field of the subject. It is suggested that lesions responsible for retraction nystagmus can also affect the visuomotor integration mechanisms; the foveation of the target is then obtained through a typical modification of the motor strategy.
对4例患有眼球后缩性眼球震颤和上视麻痹的患者进行了眼动分析。临床和放射学数据表明，病变相对局限于中脑最靠前和靠背侧的部分。眼电图检查未发现水平眼动有其他明显异常。最突出的缺陷是倾向于进行幅度不足的扫视运动，随后是多次纠正运动。这种倾向在朝着受试者视野中意外移位的亮点进行扫视运动时尤为明显。提示导致眼球后缩性眼球震颤的病变也可能影响视觉运动整合机制；然后通过运动策略的典型改变来实现对目标的中央凹注视。
