Objective:Although cerebral ischemia especially multi-cerebral infarction has been proved to be the main cause of vascular dementia (VD), one of the main type of senile dementia.On the other hand, it's difficult to conform the relationship between vascular diseases and dementia.Study showed 3 monthes after cerebral ischemia in >60 age patients, incidence rate of dementia is 9 times of that of normal people. there were 83% of lacunar infarction patients showed cognition and behavior function impairment, whi...