How To Treat Difficulty In Walk While Diagnosed With Dementia In Elder Person?

my mother is 90 years old and has demencia she is unable to walk without assistancenine days ago she fell so i pressed her emergency button for assistance someone came and helped her back to her chair she was shook up for a while but by the end of the day she was fine now a week later she is afraid to walk could this be because of the fall last week or could she have fallen again