While Alzheimer's disease has most often been considered to be the culprit of these symptoms, there are many other forms of diseases affecting the brain causing dementia symptoms. Vascular disease, high blood pressure, stroke or transient ischemic attacks (TIAs) can lead to damage in the blood vessels in the brain, which can lead to a condition called vascular dementia. A condition, which causes formation of what is called Lewy bodies in the brain, which, causes a disruptive in the brain's functioning, and is referred to Lewy Body Dementia. Frontal temporal dementia affects the frontal and temporal lobes of the brain, and results in symptoms of dementia. These are just the top of the list of causes of the symptoms of dementia. Various other forms of dementia exist.