Brain examination mainly includes the following: 1. Brain imaging, the most commonly used examination, mainly brain CT and brain MRI, can detect most of the organic lesions of structural abnormalities in the brain, including brain hemorrhage, brain infarction, brain tumor, encephalitis, brain trauma, etc. 2. Vascular examination, mainly including transcranial color Doppler ultrasound, CT angiography, magnetic resonance angiography, etc., can clarify the brain 3.Lumbar puncture cerebrospinal fluid examination, is an indirect examination, mainly through the observation of cerebrospinal fluid to clarify the existence of organic lesions in the brain, especially for inflammatory lesions have important differential diagnostic value, is a routine examination means for all meningitis and encephalitis. 4.Electroencephalography, mainly for epilepsy, can also be used to identify When the disease involves the cerebral cortex, the EEG can also appear abnormal.