First of All: What is Dementia?
Dementia: An Umbrella Term Describing a Spectrum of Brain Disorders
Alzheimer's is Its Most Common Form
Dementia is an umbrella term that describes a collection of symptoms that are caused by disorders affecting the brain. It is not one specific disease. Dimentia affects thinking, behavior and the ability to perform everyday tasks. Brain function is affected enough to interfere with the person's normal social or working life.
Alzheimer's Dimentia is its most common form.
As noted above, Alzheimer's Dementia is the most common form. It accounts for approximately 40% to 70% of all dementias.
Vascular Dementia is the second most common type. It accounts for approximately 15% to 25% of all dementias.
Lewy Body dementia is a disease associated with abnormal deposits of a protein called alpha-synuclein in the brain. It accounts for approximately 2% to 20% of all dementias.
Frontotemporal dementia (FTD) is a group of related conditions resulting from the progressive degeneration of the temporal and frontal lobes of the brain. It accounts for approximately 2% to 4% of all dementias.
Include dementias associated with such conditions as Parkinson's, Huntington's, head trauma, HIV, alchohol-related dimentia, Cutzfeld-Jakob disease, coticobasal degeneration and progrssive supernuclear palsy.