He has had a difficult year with sepsis, a septic knee, surgery, then falling a breaking his hip which of course required another surgery. Instead of getting stronger, he seems to be getting weaker and falling for no apparent reason. He walks with a walker, and when you ask him how it happened, he doesn't know. Two days ago he fell off the edge of the bed again after reaching for a cup of coffee on the dresser. Could it be Parkinson's Disease?