Acephalgic migraine is

Patients with acephalgic migraine (typical aura without headache) experience recurrent neurologic symptoms, often with nausea or vomiting, but with little or no headache. Veigo can be prominent; it has been estimated that one-third of patients referred for veigo or dizziness have a primary diagnosis of migraine. Migraine aura can have prominent brainstem symptoms, and the terms basilar aery and basilar-type migraine have now been replaced by migraine with brainstem aura. Ref Harrison 20th edition page 3096, 3097 ( table 422-1)