what is the disease that causes dementia
Common causes of dementia that cannot be reversed are: 1  Parkinson's disease. Dementia is common in people with this condition. 2  Dementia with Lewy bodies. It can cause short-term memory loss. 3  Frontotemporal dementia, a group of diseases that includes Pick's disease.  Severe head injury that caused a loss of consciousness.
Less common causes of dementia that cannot be reversed include: 1  Huntington's disease. 2  Leukoencephalopathies, which are diseases that affect the deeper, white-matter brain tissue. 3  Creutzfeldt-Jakob disease, a rare and fatal condition that destroys brain tissue.  Brain injuries from accidents or boxing.