Dementia

My grandma has been in a nursing home since October. She is far gone with dementia, we can’t have a normal or even somewhat normal conversation with her. However, she is the only one in the unit who cries. She also acts up too. I know the acting up is part of the disease but seeing as how nobody else cries and they all seem to be content could it be that my grandma got effected by it from crying all the time? Meaning That’s more or less the part of her brain that it effected? Also she only has us, no other family or friends really. I can tell that my mom feels some type of way that she never gets any other visitors. She was never really the type who wanted company in her better days so I said ppl who don’t express an interest in socializing Won’t really get any company