It is not uncommon to see patients with cerebral thrombosis who arrive at the hospital more than ten hours or even a few days later. Undoubtedly, these patients have missed the best time for treatment. In recent years, there has been a consensus in international and domestic academic circles that cerebral thrombosis should be treated as early as possible, and thrombolysis in acute cerebral infarction within 3 hours (or 4.5 hours) is necessary to achieve better results. Most of the larger hospitals in China have already carried out thrombolysis in the hyperacute phase of cerebral infarction, but for various reasons, the proportion of patients with cerebral infarction in China who can receive thrombolysis within three hours is much lower than that in the western international, which means that a considerable number of patients do not have the opportunity to receive treatment by this method with better efficacy. To facilitate the understanding of patients and the public, we would like to revisit a set of data about “time is brain”: the average evolution time of cerebral infarction is 10 hours (6 – 18 hours). The average brain (forebrain) has a total of 22 billion nerve cells. Typical common, acute cerebral infarction of the cerebral hemispheres —— Number of brain tissue destroyed per 1 hour: 120 million neurons, 830 billion synapses, 714 km of myelinated nerve fibers. Every 1 minute, the number of brain tissue destroyed: 1.9 million neurons, 14 billion synapses, 12 km of myelinated nerve fibers. In addition, compared to the neuronal loss in normal brain aging, every 1 hour after a stroke, if left untreated, is equivalent to 3.6 years of brain aging. If left untreated, acute brain infarction, every 1 minute, can lose 1.9 million neurons (also known as the legendary brain cells) ah. Therefore, please inform the middle-aged and elderly at home that if an acute cerebral infarction occurs, please go to the nearest hospital in a timely manner. Once you have symptoms of stroke, you must act fast. Quick, quick, quick, F.A.S.T. F, face, crooked corners of the mouth? It’s not obvious. You can see better with a smile. A: Limb: Can’t lift your arm? Numbness in the limbs? Can’t lift legs and feet? S: Speech: can’t speak well? T: Time: Be quick, with any of the above three abnormalities, call the emergency number immediately, or go to the hospital immediately.