Korsakov syndrome, also known as organic amnesia syndrome, was first reported by the Russian psychiatrist Korsakoff after whom the syndrome was named. It manifests as selective cognitive dysfunction, including near-event amnesia, temporal and spatial disorientation, without overall diminished intelligence. Diagnosis of ethanol-intoxicated Korsakov syndrome is based on 1, memory impairment that manifests as near-memory impairment (learning new material); temporal perception impairment (rearrangement of the chronology of events, compression of several recurring events into one, etc.). 2.No immediate recall impairment, impairment of consciousness and extensive cognitive impairment. 3. History or objective basis of chronic (especially high dose) ethanol or drug use. 4. Personality changes with significant indifference, lack of initiation and a tendency to self-neglect may also be present, but are not necessary for diagnosis. MRI examination: MRI examination of the brain of patients with Korsakov syndrome is used to observe whether there are lesions in the brain and to clarify whether the patient is caused by structural changes in the brain. intracranial tumors often cause epilepsy, and MRI has a high diagnostic confirmation rate for low-grade astrocytomas, ganglia, gliomas, arteriovenous malformations and hematomas in the brain. mri plain scan of ischemic cerebral infarction A large long T1-long T2 finger-shaped edema was seen in the left frontoparietal white matter area, with localized invasion to the opposite side through the corpus callosum. The patient’s age was considered to be the most likely to have advanced glioma. 2.CT examination of the cranium: It is a method to examine the cranium through CT. It can clearly show the anatomical relationship between different cross-sections of the skull and the specific brain tissue structure. Thus, it greatly improves the detection rate and diagnostic accuracy of lesions. For craniocerebral injury, it can distinguish the size, shape and number of hematoma and its adjacent brain tissue compression. The diagnostic accuracy can reach more than 98%, and can be used as a routine examination of craniocerebral injury.