Paroxysmal convergence spasm in multiple sclerosis.

Paroxysmal phenomena are rare but relatively typical clinical symptoms of multiple sclerosis (MS) caused by abnormal excitation in demyelinated plaques. We report the case of a 25-year-old woman with ocular convergence spasms as a new type of paroxysmal phenomenon in MS. MRI revealed the associated brainstem lesion in the region of the medial longitudinal fasciculus. Bromocriptine treatment was successful in resolving the paroxysms.