Dementia is a serious loss of global cognitive ability in a previously unimpaired person, beyond what might be expected from normal ageing. It may be static, the result of a unique global brain injury, or progressive, resulting in long-term decline due to damage or disease in the body. Although dementia is far more common in the geriatric population, it can occur before the age of 65, in which case it is termed "early onset dementia". Dementia is not a single disease, but a non-specific syndrome. Affected cognitive areas can be memory, attention, language, and problem solving. Normally, symptoms must be present for at least six months to support a diagnosis. Cognitive dysfunction of shorter duration is called delirium. Especially in later stages of the condition, subjects may be disoriented in time, in place, and in person. Dementia can be classified as either reversible or irreversible, depending upon the etiology of the disease. Fewer than 10% of cases of dementia are due to causes that may be reversed with treatment. Wikipedia [ - ]

Dementia is a serious loss of global cognitive ability in a previously unimpaired person, beyond... [ + ]