[Nervous system diseases of the aged].
D000368:Aged; D002544:Cerebral Infarction / Q000453:epidemiology; D002561:Cerebrovascular Disorders / Q000175:diagnosis / Q000453:epidemiology*; D003704:Dementia / Q000453:epidemiology*; D006801:Humans; D007564:Japan; D013345:Subarachnoid Hemorrhage / Q000453:epidemiology