How is alzheimer's and dementia diagnosed?

Mostly Q&A: While there may be some lab work in some cases, mostly interviews & psycho-neurological testing with the person along with interviews with caretakers about behavior and history are used.

Alzheimer, Dementia: Mental status examination including memory impairment, disorientation to time , place, and person, decline in intellectual functioning and impairment of attention and concentration helps in diagnosis of alzheimer, and dementia. At times blood tests and ct scan of brain help in the diagnosis.