Working Memory

I have a diagnosis of short-term memory loss, among several other things, from my snowboarding accident.  Supposedly, my cognition didn't get affected.  Didn't it, though?  Doesn't all cognition rely on the recollection of events that just happened?  I would contend that my accident affected my cognition a little bit.  I no longer have the intelligence of a genius, like I used to have, but I only have the cognition of a really smart person.  Doesn't an IQ of 197 make a person a genius?