Dementia
Very often, short-time memory, mind, speech and motor skills are affected. Certain forms of dementia cause a change in the personality of the sufferer. A person suffering from dementia will lose certain skills and knowledge they already had. This is the main difference to other conditions affecting the mind. People who suffer from learning problems, or lower intelligence will never acquire certain skills, people suffering from dementia will lose skills they have acquired. Dementia is more common in older people. Certain forms of dementia can be treated, to some extent. The most common form of dementia is Alzheimer's disease, which accounts for between 50 and 60 percent of all cases.