[Monocular circumduction nystagmus. Are the central oculomotor pathways partly monocular?]

Circumduction-related nystagmus is an extremely rare and complex oculomotor anomaly. A case observed in a patient with multiple sclerosis was monocular. The lack of any motor paralysis sign demonstrated that central oculomotor pathway dysfunction can affect only one eye. This would only be possible if the central oculomotor pathways were at least in part monocular.