JOURNAL OF ISTANBUL FACULTY OF MEDICINE-ISTANBUL TIP FAKULTESI DERGISI, sa.2, ss.55-57, 2010 (ESCI)
We report a 52 years old male patient who developed acute onset diplopia and vertigo. Neurological examination revealed combined upward and donward gaze palsy and his MRI scan displayed a small unilateral lesion in the right midbrain. The lesion is presumed to have interrupted the pathways involved in vertical gaze palsy just before decussation producing a functionally bilateral lesion. In this case, we would like to question whether there is a right sided dominance in the pathways controlling the vertical gaze.