They performed the tests you mentioned and various others. Other tests ruled out Meniers Disease, stroke and normal pressure hydrocephalus. There was also no evidence of cerebellar involvement. The report of the assymetical ventrical mentioned "cortical atrophy." However, they believed it had been there for a long time. When given mental tasks I was not able to count backwards by sevens, remember who the president preceding the then current president, nor could I with closed eyes touch the tip of my nose with my index finger.