The setting for my story is the mid 19th century, but I mostly need to sort this out to decide whether the character's problem with his playing is real or imagined. However, the character obviously needs to survive the possible head trauma, so in that sense the setting matters.
I've read various websites on brain injuries I've found under search terms 'brain injury' and 'head trauma' +'symptoms', but I don't really know how to specify my search. Based on what I've read, it seems to me that usually a brain injury causes a wider range of symptoms, but I'd like to be sure.
Thanks a lot in advance!