Advice on how to deal with live-in mother?

My mother has lived with us for 3 years now. She has her own apartment downstairs with a private entrance. She has severe hearing loss and hearing aids do not help much. She has a curvature in her spine, but was fine until she fell over 3 years ago and now does not trust her legs to hold her up. She has all but completely withdrawn from any interaction with the outside world. She will go to the grocery store weekly, but not much of anywhere else. My husband and I ask her continuously to go places with us, but she refuses. She uses her hearing as an excuse. She is afraid of everyone who comes to our house, and will leave the room if anyone comes over. She sets in the dark most times and does not talk to anyone except the dog. I'm an only child. I don't know what to do to help her. Should I try to contact her doctor and talk with them about how she chooses complete isolation? Original article retrieved from: https://www.agingcare.com/discussions | agingcare.com | sjohnson9