Dementia is a catchall term for any disease or lesion affecting the brain that brings about a decline in cognitive functioning. The medical term for dementia is neurocognitive disorder. Types of dementia include Alzheimer’s Disease, vascular dementia, dementia due to stroke, dementia due to HIV infection, dementia due to substance abuse, and dementia due to a number of neurological disorders. Dementia is much more than memory loss. Other symptoms are inability to focus attention, inability to plan a sequence of behaviors, learning impairment, and speech impairment, there is a marked decline in self-care skills, and the ability to interact socially.

More information can be found at: https://positivemed.com/2015/12/10/how-to-recognize-early-dementia-signs-and-prevent-memory-loss/