Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Basilar migraine ?
    ### Response:
    Basilar migraine is a type of migraine headache with aura that is associated with bilateral (on both sides) pain at the back of the head. An aura is a group of symptoms that generally serve as a warning sign that a bad headache is coming and may include dizziness and vertigo, slurred speech, ataxia, tinnitus, visual changes, and loss of balance.
    