Dementia is the term used to describe the symptoms of several conditions affecting the brain. Dementia is the term used to describe the symptoms of a number of brain conditions. Alzheimer's disease is commonly seen, and other conditions include Parkinson's disease. Symptoms seen in early stages are changes in personality, withdrawal, loss of memory, confusion and apathy. Early diagnosis helps to ensure early treatment, assistance and planning. Medicines may help with certain dementia symptoms, but no permanent cure. The majority of people with dementia are over 65 years of age, the condition is not normal for everyone older. The incidence of dementia increases with age, but it is not because an older person develops it. Although only 1 in 4 people was diagnosed with Alzheimer's disease or dementia. Few more information about vascular dementia, Lewy body dementia, frontotemporal dementia, rare causes of dementia, Creutzfeldt - Jakob disease, cognitive impairment associated with HIV, mild cognitive impairment.