Alzheimer’s disease, commonly known as Alzheimer’s disease, is not a chronic, progressive, irreversible degenerative disease of the nervous system that involves the cerebral cortex. It is a chronic, progressive, irreversible degenerative disease of the nervous system involving the cerebral cortex. The early manifestation of Alzheimer’s disease is near memory loss, and there can be a variety of cognitive functions such as calculation, thinking and judgment, and temporal and spatial task orientation impairment. Performance of Alzheimer’s disease 1. Memory loss. Some family members say that the elderly at home have a deep memory of long-ago things, which does not deny the existence of senile dementia, because the recent memory loss of the elderly is very obvious, just to him (her) said the words forgotten in the blink of an eye (before speaking and then forget), there was an old man from Chengdu to Chongqing this drive repeatedly asked a question nearly 100 times, asked where to go Once there was a moderately demented elderly, living alone, with a nanny to take care of her daughter cared for her, told her to take her bedding over to wash it, but the elderly forgot, decided that her daughter stole her sheets, cleaning the sheets to bring over, denied that this is her original sheets, and firmly asked her daughter to return her original sheets. The daughter had no choice but to buy her a new one, but she still insisted on the original, but also scolded the daughter, the daughter was very aggrieved and helpless; important appointments to forget, as if there was no such thing, reminded of it. 2, time space character orientation poor. Often can not remember the year, month, day of the week, spring, summer, autumn and winter can not be distinguished. An old man in his eighties often sleeps until midnight and has to get up, thinking it is dawn. I can’t find my way home when I go out. I used to be a local old man in Chongqing, but I can’t find my way home when I arrive at Jiefangbei. Can not remember the names of friends and relatives, serious even family members do not recognize, once a demented old man called her son tomatoes, and even do not recognize themselves in the mirror, speak with her or even quarrel. 3, analysis and judgment ability is reduced. A very simple problem are looking ahead, indecisive, can not make a decision, and the previous style of action is different. 4, the calculation ability is reduced. Can not calculate the account, the original salary can spend, gradually do not know the concept of money. Very simple arithmetic can not be calculated, for example, 10-7 = ? l consecutive 100-7 can not be calculated, or miscalculated, or very slow response. 5. The ability to learn new things is diminished. A remote control board function repeatedly taught just can not learn, automatic washing machine, rice cooker can not be used. 6.Change in personality. Once generous people have become stingy, calculating money, and lovers are clearly divided; once extroverted people become non-verbal reluctant to interact. Become stubborn, not listening to advice. 7. Abnormal mental behavior and emotional instability.