In his book Musicophilia, Oliver Sacks discusses a case involving a woman named Rachel Y. who lost the ability to process harmony in a car accident. He then explains how this lead to simultanagnosia. He terms this loss of harmony "dysharmonia."
Is dysharmonia a recognized medical condition? My google fu didn't yield anything besides his book. If it is legit, are there any regions of the brain that when damaged induce dysharmonia?
Click here to read the case.