A study published May 2014 by the University of Miami found there may be a link between brain injury from decreased blood supply (infarction) and migraines in older patients. The study did not indicate that one condition necessarily caused the other, but the link suggests further exploration should be undertaken.
Chiropractic is an excellent tool in the control of migraines.
Monteith, T, et al. Migraine, White Matter Hyperintensities, and Subclinical Brain Infarction in a Diverse Community: The Northern Manhattan Study. Stroke. May 15, 2014.