Paroxysmal phenomena are rare but relatively typical clinical symptoms
of multiple sclerosis (MS) caused by abnormal excitation in demyelina
ted plaques. We report the case of a 25-year-old woman with ocular con
vergence spasms as a new type of paroxysmal phenomenon in MS. MRI reve
aled the associated brainstem lesion in the region of the medial longi
tudinal fasciculus. Bromocriptine treatment was successful in resolvin
g the paroxysms.