[Nuclear oculomotor nerve syndrome and ocular tilt reaction caused by mesencephalic hematoma].

A 78-year-old man had a midbrain hemorrhage, documented by CT scan and MRI, resulting in a mild cerebellar syndrome predominant on the left upper limb, lateropulsion, and a complex ocular motor syndrome. The latter was associated with right nuclear oculomotor nerve palsy, gaze paresis to the left for voluntary saccades, and a tonic ocular tilt reaction. Pathophysiological mechanisms are discussed.