Some interesting work on the visionary writings of the 12th century Abbess Hildegard of Bingham. Her visions are now being understood as manifestations of migra

Some interesting work on the visionary writings of the 12th century Abbess Hildegard of Bingham. Her visions are now being understood as manifestations of migraines. I believe Oliver Saks was the first to understand them in this way. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4103393/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4103393/