Perform a therapy to put the inner ear
little tiny bones in order
Welcome and thank you for posting your question.
If Cat and MRI
do not find anything, and she has been strugglin with it for a long time, then you should consider something else. This unknown vertigo
may come from a disbalance of the tiny bones of the inner ear.
There is a therapy performed in the office of a Ottoiater, Ear-doctor (OTR or ENT). He will make you sit and do different exercise (not very easy), to put in balance again the small tiny bones of the innear ear.
Try to ask if your local ear-doctor can perform it, otherwise check for an appointment with someone else that can do it to your daughter.
If you have more question, please feel free to post them.