Tests are showing nothing. My MIL was a generally healthy 95 year old living fairly independently in a retirement facility in her own apartment- she injured herself and has now been moved to an assisted living facility (nursing home). She's now become quite confused in a very short amount of time - 4-6 weeks. She was very high functioning before and now has taken a dramatic turn for the worse. So far medical tests have revealed nothing. This seems too rapid a loss of cognitive function too quickly. Anyone else experience this?