Hi, ronwy ... the visit will probably be a long one. They'll take a thorough medical history, but probably do very few tests ... maybe lung function (blowing into tubes, etc) and the usual neuro stuff ... bonking with little hammers, having your mom walk around.
I'd take a list of all your mom's medicines, including dosage and how frequently she takes them. Include any over-the-counter stuff. I always take a list of surgeries and medical problems, etc., with dates, as they will want that, and I forget things in the doctor's office if I don't have them written down. Also, take a list of all your mom's doctors, with phone numbers. If you have copies of any of the tests she's had done, I'd take those, too.
Write out your questions in advance. You will probably leave with 100 more questions than you went in with, but that's normal. See if there is a way to contact the clinic for asking questions later ... e-mail, phone calls, etc?
I would imagine they will schedule more tests, unless she's had some (like EMG) recently, and may set-up follow-up appointments with therapists. They probably will write some prescriptions, too.
It should not be stressful at all. I find that the clinic doctors are willing to listen and they do pay attention to what you're saying (some of the time
) The MDA rep may be there, too, to talk to you about services they provide. Mine has seen me at all my clinic visits, and is extremely helpful ... in person and financially from MDA !
Good luck to you and your mom.