VASCULAR DORSAL MIDBRAIN SYNDROME - CLINICAL AND OCULOGRAPHIC FINDINGS IN 4 CASES

The authors report the clinical, electrooculographic and radiologic fe atures in four cases of unilateral vascular dorsal midbrain syndrome. In each case the syndrome presented all the characteristic signs, i.e. , convergence-retracting nystagmus, vertical gaze impairment, lid retr action and pupillary abnormalities. In two cases downward gaze only wa s impaired. The lesion was hemorrhagic in three cases and ischemic in one. CT and MRI demonstrated the site and the etiology of the lesions. All the cases presented a spontaneous improvement of signs and sympto ms.