Mr. Zheng was in the prime of life and his career was booming, but one day he suddenly found that his body was not working well. He went to the neurology department of Beijing Chaoyang Hospital West, and after examination, it was found that he, a young man, had encountered the disease of old age – cerebral infarction. So what is brain infarction all about? First of all, let’s get to know the structure and function of the brain. Let’s start with the structure of the brain. The average person has never seen the real face of the brain. Only in brain surgery can we see what a living brain looks like. Underneath our scalp is a sphere-like skull with three layers of meninges on the inner surface of the skull, only the first layer of meninges is the strongest and protects the brain tightly. The brain is very tender, just like white jelly. The arterial blood vessels enter the brain from the bottom of the brain, like a big tree, and keep dividing into finer and finer branches, which eventually become capillaries, and these capillaries supply oxygen, water and other nutrients directly to the brain cells through the blood. The brain is the organ that requires the most oxygen and blood in the body. Although the weight of the brain accounts for only 2% of the body weight, the oxygen consumption of the brain is 20% of the total oxygen consumption of the whole body, and the blood flow accounts for 20% of the blood flow of the whole body. The brain requires so much blood and oxygen because its metabolism is particularly vigorous and needs to constantly consume a lot of energy, as shown in the resting state, including sleep, there is still frequent brain electrical activity, the brain is constantly working to synthesize the substances necessary for our normal thinking function. In the excited state, the brain’s oxygen consumption will increase exponentially. Since the brain is the organism with the most vigorous oxygen metabolism, it is the least tolerant to ischemia and hypoxia. Brain tissue has almost no storage of energy substances. Once the blood supply to the brain is completely stopped, the oxygen diffused in the brain tissue and combined in the blood will be completely depleted within 8-12 seconds, and the small amount of energy substances stored in the brain tissue will be completely depleted within 2 minutes. Thus, the functional and structural integrity of the brain must depend on a continuous supply of normal blood oxygen and blood glucose. In humans, complete interruption of the cerebral blood supply for 6 seconds results in chaos of consciousness. Cardiac arrest for 10 seconds disappears spontaneous brain electrical activity and permanent brain cell damage begins to occur in 5 minutes. Whole brain ischemia for 10 to 20 minutes produces severe and extensive selective neuronal necrosis; focal cerebral infarction occurs in 1 to 2 hours of ischemia. Let’s talk about the function of the brain. Modern medicine has made it clear that the heart is only the equivalent of a pump, responsible for sending blood to the whole body. It is our brain that is responsible for our thoughts. The brain is not only responsible for thought, but also for our language, the movement of our muscles, the perception of heat and cold in the external environment, the processing of the external environment seen by the eyes into images of the body, and the processing of the sound waves heard by the ears into sounds that we can understand. Our brain is divided into two cerebral hemispheres, a brainstem, and two cerebellar hemispheres. If for some reason the arteries supplying the brain become blocked, a localized cerebral infarction can occur. Brain infarction used to be called “cerebral thrombosis” or “cerebral infarction”, which means about the same thing, just like the change of myocardial infarction to myocardial infarction, but some friends panic when they hear “death”. “death” is} panic. If for some reason a cerebral artery ruptures, a brain hemorrhage will occur. Among all cerebrovascular diseases, cerebral hemorrhage accounts for a relatively small percentage of only 15%, and the remaining 85% are cerebral infarction. After suffering from cerebrovascular disease, different manifestations will occur depending on the location of the lesion, such as hemiplegia, hemianesthesia, half vision invisibility, dizziness, slurred speech or inability, etc. In severe cases, unconsciousness and incontinence may occur. One characteristic of cerebrovascular disease is cross-dominance, meaning that lesions in the left half of the brain can affect the function of the right limb. Today we have talked about some topics related to cerebral infarction, and we would like to summarize them here in three sentences: First sentence: the brain is delicate and needs continuous blood supply, so once the cerebral arteries are blocked, cerebral infarction is likely to occur. The second sentence: Brain infarction can be life-threatening when it occurs, and even if it survives, it is easy to fall into sequelae, which can seriously affect people’s work and life. The third sentence: cerebral infarction is not the patent of the elderly, this silent killer is also threatening the health and life of young and middle-aged friends at all times.