Dementia involves decline in memory, and at least one of the following:
- Inability to generate coherent speech and understand spoken or written language.
- Inability to recognize or identify objects.
- Inability to execute motor activities.
- Inability to think abstractly, make sound judgments and plan and carry out complex tasks.
The different types of dementia are associated with distinct symptom patterns and / or microscopic abnormalities in the brain. The common types of dementia are:
- Alzheimer’s Disease
- Vascular Dementia
- Dementia with Lewy Bodies
- Normal Pressure Hydrocephalus
- Mild cognitive impairment (MCI).
- Frontotemporal Dementia
- Parkinson’s disease often results in dementia in the later stages. This involves Lewy bodies (abnormal deposits of the protein alpha-synuclein) inside nerve cells in the brain.
- Creutzfeldt-Jakob disease (and “Variant Creutzfeldt-Jakob disease”) caused by abnormal prion proteins in the brain.
There may also be mixed dementia.
DeMarco, B. (2010). Dementia and the Eight Types of Dementia. Alzheimer’s Reading Room, August 27th 2010.