1.What is lacunar cerebral infarction? Cavernous cerebral infarction is named after the pathologic diagnosis, and refers to the general term for small fresh or old deep cerebral infarcts with diameters of 15-20 mm or less. Occlusion of these small arteries can cause multiple foci of cerebral softening of varying sizes, culminating in the formation of large and small lacunae. Due to the different blood vessels of infarction, different neurological symptoms are often manifested, and the most common ones are headache, dizziness, insomnia, amnesia, numbness of limbs, movement disorders, difficulty in pronouncing words – stupid hand syndrome, and dementia, hemiparesis, aphasia, etc. in severe cases. 2.How to diagnose lacunar cerebral infarction? (1) Most of the patients develop the disease at the age of 50 or above, and often have a history of long-term hypertension, arteriosclerosis and heart disease. (2) The onset of the disease is slow, and the symptoms peak in a few hours or days. (3) Clinical symptoms are mild, mostly without headache, vomiting and consciousness disorder. (4) Neurologic signs are limited and simple, such as pure motor hemiparesis, pure sensory stroke, ataxic paresis, and natriuretic clumsiness syndrome. (5) There is no abnormality in auxiliary tests such as electroencephalogram, cerebrospinal fluid and cerebral angiography. (6) CT can confirm the diagnosis. There is often a low-density area of 3 to 10 millimeters, and CT cannot show lesions smaller than 2 millimeters.