Hi, my brother is 61 years old and lives in Palm Desert California, works as respiratory therapist, he recently developed some symptoms that were miss diagnosed as Parkinson s disease, they gave him medication that made him worse, he has slightly slurred speech and he told me that his ability to write for example sign his name is not the same anymore, before the medication he could walk but slowly now he can stand up but walking is very difficult, he had all kind of tests and also MRI for the head and nothing could be found not even traces of a stroke, his cognitive ability is still good but his movement is affected majorly, they started him on physiotherapy to get him to walk again I live far away in Canada ,but very concerned and worried please tell me what could be the reason for this to happen,