Does anyone know how to create new nueropathways in the brain?

My mum has had a brain operation which got infected. The hospital say that she may not have use of her right leg as a result. I have read that the brain has the ability to create new nueropathways by way of NLP and exercise - but I am not sure how this can be done. There has been stuff on how stroke victims are able to walk as a result of this.