Where is my violin when I need it?? Seriously, your mother is attempting to do that guilt-trip thing, that all mother's use occasionally. However, I would say this is extreme. I would not reply to her, and I would not contact her. Especially right now when it is still fresh, and you most likely are still quite upset. It is never a good idea to discuss these kinds of things when both parties are still upset. Words can't be taken back.
I had something similar happen with my father. He never really pays attention to my son when we visit. He is constantly on his laptop, playing his piano, or watching t.v. He has a hard time listening as well, and often tunes things out. When my son got sick once when we were visiting him, he stated that he didn't know what to do. ( my father is a doctor, and knows what to do) He then left to go to dinner with his wife. After this incident, I have not visited him. I also did not contact him for awhile afterwards. It isn't worth arguing with someone who will not change, and who does not listen nor think anything is wrong with them.