Pontine infarction: angiography and magnetic resonance imaging.

Magnetic resonance imaging (MRI) has several advantages over other central nervous system imaging techniques in the posterior fossa. The usefulness of MRI in demonstrating important clinico-anatomic correlations in neuro-ophthalmologic disease of the brainstem is illustrated by a case of a pontine infarction causing abnormal horizontal gaze with preserved vertical gaze and convergence.