Dementia is diminished mental powers,due to faulty working of the brain.There are several causes but the most common cause is Alzheimer's Disease.Dementia effects people of all races from all walks of life, people of different sexes.Dementia usually effects older people but the age group is getting lower. Dementia effects the rich and the poor, good or bad. Dementia is nothing to be ashamed of. Dont ridicule sufferers, they are not mad or bad Its just sad,they are ill they have Dementia.