ABSTRACT
Dementia is not the name of a single illness but of several symptoms which affect the working of the brain; it affects the functions of the brain. Memory is affected and most people with dementia forget many things, even the names of their close family. Dementia is caused by damage to brain cells which can be caused in different ways depending on the form of dementia. Symptoms are not identical as different parts of the brain are affected by each form of dementia. A stroke blocks the flow of blood to the brain and so the brain does not receive enough oxygen and becomes damaged. Lewy bodies are abnormal spherical structures which develop in the nerve cells in the brain leading to the death of the cells. This is caused by the degeneration of one or both of the frontal lobes of the brain.
