And speaking of brain disorders...
Created | Updated May 23, 2005
The most common form of synesthesia, audition coloree, causes6 the afflicted to hear colors.7 Curiously,8 blood flow decreases somewhat in the neocortex and increases dramatically in the limbic system during episodes of audition coloree.9
8Whether this is cause or effect is a matter of some debate.9Apparently the brain's higher information-processing capabilities nod off with the onset of color-hearing while an older, darker, more primitive way of apprehending the world comes roaring to the fore.