Dementia is an umbrella term for a variety of conditions that result in impaired mental function. Alzheimer’s disease is the most common type of dementia. Other forms of dementia include Lewy Body dementia (associated with deposits in the brain called Lewy bodies), Parkinson’s disease, vascular dementia (associated with small vessel strokes), and frontotemporal dementia (associated with a degeneration of neural structures in the frontal and temporal lobes).