My then 86 yr old mother moved slowly with a cane but got around fairly well. About a year ago she ended up in the hospital for a 'funny feeling in her chest' which turned out to be a UTI and dehydration. A week later for her follow-up visit with the cardiologist, she needed her walker and was slower than a snail! I attributed it to her being in the hospital as mental capacities are affected, but it has not improved with time. I have since seen postings on this forum that mention mobility problems caused by different forms of dementia and wonder if such a sudden onset is common under those circumstances. Any other thoughts? Mini-stroke, perhaps? She has not had further medical emergencies.