The conclusions from a Korean study from 2012:
(VTF = Vestibular Function Test)
“We were unable to find clinically significant differences between VM patients with central type VFT results, peripheral type VFT results, and normal VFT results. That is, the clinical manifestations and prognosis were similar in all three groups, regardless of the VFT findings. VFT results in VM patients may be non-specific and clinically non-significant. It therefore appears that the treatment strategy should be focused on the migraine itself rather than the status of vestibular function.”
So focusing on the migraine itself - nothing new really to most people on the forum.