Regarding recovery and memory loss from an AN I think alot has to do with age, physical endurance, if one is retired or if one is employed and the type of job will have some impact on overall recovery. In my situation I had three brain surgeries in 2006 as well as mennigitis recovered very well, no headaches and take no medication, went back to work full time in 2.5 months (very demanding job) and back exercising after 3 months. I have permanent facial paralysis and had double vision (that was corrected in 2007).
However, memory loss and the ability to focus was not not something I noticed immediatly. I had my AN removed in 2006 but I noticed a few years later that I have trouble reading for long periods of time, my handwriting which was bad before my sugery is so bad now I can't even read it so I try to limit any handwriting and type everything. Also, when my family talks about movies and situations I find I have no idea what they are talking about. I have basically forgotten many things but I don't realize it unless someone brings something up. I get together with my close childhood friends every other month for bithrday celebrations and of course we talk about the past and I find there are some situations which are greek to me but the flipside I can remember other things in detail. I do believe that my AN has had an impact on my memory and it helps when I don't want to talk about something I just say "I can't recall that it was before my AN" : )