You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Acephalgic migraine is and explain in detail?
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 Migraine aura can have prominent brainstem symptoms, and the terms basilar aery and basilar-type migraine have now been replaced by migraine with brainstem aura.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)