Currently, we know that these plaques and tangles are characteristic of Alzheimer's disease, and only when identified in the brain, can make a definite diagnosis of Alzheimer's disease. Memory loss is a common symptom of aging called normal a olvidos benign senescent and a operationally defined as deterioro of age-associated memory , but can also correspond to the initial state of a demenciaa . Alzheimer's disease is a medical condition which disturbs the functioning of the brain, affecting those parts of the brain that control thought, memory and language. It is a progressive disease that develops in stages a "rule, since its inception in the late stages, the average time period is five years, gradually destroying memory, reasoning, trial, language and, eventually, the ability to carry out even the simplest tasks. Its onset is usually with a lack of short-term memory.

Appear at this stage, the first problems in the intellectual faculties. So, before knowing the diagnosis, the patient will criticize sloppy, make mistakes that hurt him or his family, he feels unable to meet their obligations. In the second stage, the problem in the cerebral cortex appear determined disorders of language, difficulty understanding complex texts, retrieving words, distortion of words and loss of skills. This also includes the loss of spatial orientation, calculation disorders, clumsiness, even lose the ability to get dressed or bathing without assistance. All of this and because of that, you can add pictures of depression and delusions of prejudice or jealousy.