Special report.  Deciphering dementia.  Loss of brain function can be caused by many disorders.
D000375:Aging; D001921:Brain / Q000378:metabolism; D003072:Cognition Disorders / Q000145:classification* / Q000175:diagnosis*; D003704:Dementia / Q000145:classification* / Q000175:diagnosis*; D003937:Diagnosis, Differential; D018450:Disease Progression; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D010353:Patient Education as Topic