I. What is memory? Memory refers to the process of storing and extracting information in the brain. In layman’s terms, it means that we remember what has happened and what we have learned into our brain, and then we are able to recall it by recalling it. Second, what is physiological memory loss? Human memory tends to decline gradually with age, generally starting after the age of 50, with no significant difference between the ages of 50 and 60, and a more significant decline after the age of 70. As soon as they pass the age of 50, many elderly people feel that their memory is not working, and what they used to be able to remember with one look and one listen is now particularly forgetful. However, some memory loss is physiological and some is pathological. Physiological memory loss is a natural phenomenon that is related to entering old age and is caused by the elderly’s reduced attentional resources, inability to adjust memory strategies and abnormalities in extraction. It is characterized by a mild degree and generally does not continue to develop after a certain level of development; forgetful people remember a certain event, cannot recall it for a while, and can recall it again afterwards, or recall it after reminding or contacting; improving memory strategies and giving cues can significantly improve memory ability; the results of formal memory examination in hospitals are usually normal; although physiological memory loss can also bring inconvenience to the work and life of middle-aged and elderly people, it is generally said that it is a natural phenomenon. Although physiological memory loss may bring inconvenience to work and life of middle-aged and old people, generally speaking, it does not have a great impact on work, study and daily life. What is pathological memory impairment? Pathological memory loss is a memory disorder caused by brain lesions, and its causes are many, such as traumatic brain injury, encephalitis, malnutrition, etc. The most common cause is various types of dementia, such as Alzheimer’s disease, vascular dementia, etc. Compared with physiological memory loss, pathological memory loss is more serious. Patients lose things and look for things all day long, and it is difficult to recall even after being reminded by others; sometimes they repeatedly ask the same question, tell the same thing, and buy the same thing repeatedly; sometimes they even suspect others of stealing their own things because they cannot find things; memory impairment often continues to progress and obviously affects patients’ lives; formal memory examination at hospitals is often A formal memory test at the hospital is often worse than normal. Patients can be accompanied by other cognitive impairments, such as reduced comprehension, expression, calculation ability, and in severe cases, can be lost, when the patient has developed dementia. If an elderly person has memory loss, it should not be simply attributed to aging, but should be identified as early as possible whether it is physiological memory loss or pathological memory impairment, and if it is the latter, it needs to be treated as early as possible.