I get aural migraines from Niacin and MSG. Most wheat based flour is enriched with Niacin. You might look into seeing if Niacin is your trigger and be able to eat wheat/yeast again.
I actually got an aural migraine while reading the article, and I had a pizza last night which is a rarity (my wife is gluten intolerant and I mostly follow her diet.)
Now I’m curious about this, thank you for posting this.