ISOLATED UNILATERAL INTERNUCLEAR OPHTHALMOPLEGIA FOLLOWING HEAD-INJURY - FINDINGS IN MAGNETIC-RESONANCE-IMAGING

Internuclear ophthalmoplegia (INO) is most commonly caused by multiple sclerosis or cerebrovascular diseases. The authors report on two case s with isolated unilateral INO after head trauma with verified anatomi cal lesion in the brainstem in the region of the medial longitudinal f ascicle. In both cases a small contusion could be detected in the MRI. Concomitant brainstem injury was excluded with brainstem auditory evo ked potentials (BAEP). A review of the world literature disclosed only one case with isolated posttraumatic INO with magnetic resonance imag ing of the lesion. In posttraumic disorders of eye motility emphasis s hould be placed on clinical diagnosis in combination with neuroradiolo gic and electrophysiologic examination to achieve accurate topographic al identification of the lesion actually being responsible for the sym ptomatology.