Great idea. But also tricky because that puts unqualified observers in the role of playing doctor. There should be a real doctor present to guide the tour, as it were.
Dr. Hammesfahr pointed out that brain-damaged patients receive commands very slowly and respond very slowly. It would be hard for us untrained observers to understand and be patient for that. We live in a faster world.
Judge Greer himself was grossly guilty of playing doctor with medical evidence. He censored it to throw out responses that weren't fast enough for his untrained eye. The result was to turn positive evidence about Terri into negative. He might have been innocently ignorant in doing this, but I think he was rigging the trial as he did so many other ways.
http://www.judgegeorgegreer.com/