A 39-year-old man comes to the physician for a 5-day history of 30-second episodes of intense dizziness occurring 15-20 times per day. These episodes are sometimes associated with vomiting and abnormal eye movements. He has no past medical history. Which of the following is most likely to be seen in this patient?
Abnormality of medial longitudinal fasciculus
Antibodies against aquaporin-4 of astrocytes
Jimson weed use
MPTP use
Otolith
