You've received some very accurate and compassionate advice. Apply what you can to your situation. Do what you can to reduce situations that cause anxiety for your mom. Some Alz/dementia patients can become extremely anxious by changes in routine. A different room, a different care giver, a different mail man, what ever.
Some regress into the fears of their life. A man may not go to bed because "it's not his" or "he can't pay this hotel bill", a fear from depression years.
Some will not keep clothes on, the next one will need the closet locked because she won't remember she is dressed and get dressed over and over again until she's overheating in so many layers.
Some will not be able to sit down, because they're in the "have to walk" phase, just keep handing them their sandwich back again after they set it down to walk. Some will regress to need a teddy bear to comfort them at bedtime.
As one lady said, don't try to bring them into your world, try to meet them in their world. That is sage advice.