The history of disturbance in<unk>  is often short and abrupt onset, while dementia is more often insidious. Clinically, people with<unk>  differ from those with true dementia when their memory is tested. They will often answer that they don't know the answer to a question, and their attention and concentration are often intact. They may appear upset or distressed, and those with true dementia will often give wrong answers, have poor attention and concentration, and appear indifferent or unconcerned. The symptoms of depression oftentimes mimic dementia even though it may be co-occurring.
Pseudodementia
Procidentia
Subcortical dementia
Semantic dementia
Dementia
Vascular dementia
Early-onset Alzheimer's disease
Alcohol-related dementia