Questions in The Neurology Forum are being answered by doctors from The Cleveland Clinic , consistently ranked one of the best hospitals in America. By the way I am now 35 years old. Sue, Encephalitis is an infection of the brain itself, and differs from meningitis, which an infection of the membranes that cover the brain.
Mumps virus is a rare but well recognized cause of encephalitis.
Depending on how severe the infection was, recovery can range from complete to being left with severe disabilties. If you feel you are having new problems with thinking and memory, this warrants prompt evaluation by a neurologist, as it might be possible that this represents a long term effect of the prior infection, or a new problem which may be combining with otherwise asymptomatic long term effects from the prior encephalitis. This is treatable. I am not aware of any connection between mumps encephalitis and scoliosis. Scloiosis as you probably have been told is crookedness of the spine.