This study appeared in the journal Neurology last week and is a good piece of evidence showing that vertigo can cause migraine attacks. I would take this further and suggest that this provides some good evidence showing that those of us who already had an underlying migraine condition and were then hit with either VN or BPPV were launched into the migraine stratosphere by continuous and heavy vertigo for months on end. The latter could have easily ratcheted up the previously low-level migraine problem into full-blown MAV.
It also shows how important it is to get either the vertigo or migraine under control as it’s not hard to see how a downward spiral into hell can be kicked off by all of this. The vertigo–migraine story really is a circular argument. I think this shows quite clearly why people without migraine brains get over their VN and BPPV relatively quickly and unscathed. It’s all over in 6-8 weeks and in some cases some VRT might be needed to clean up some residual imbalance. But the recurring attacks that can go on for years is surely migraine-based.
Vertigo as a migraine trigger
Neurology 2009 Aug 25;73(8):638-42
The vestibular group shown above and on the right were exposed to a caloric test which induced vertigo and then migraine. This definitely explains why I (and so many others) suffer so badly following the caloric. They told me I would be fine after a few hours yet it threw me into a meltdown for 2 weeks many years ago.