The left side is mainly verbal, logical thinking, analyzing and synthesizing. The right side is mainly for music, art, space and so on. The functions of the left and right hemispheres have their own emphasis. The left side of the brain is dominant in speech, logical thinking, analysis and synthesis, and computational functions, and most of the dominant hemispheres are located on the left side. The dominant hemisphere is mostly located on the left side. There are a few left-handed people whose dominant hemisphere is on the right side. The right hemisphere of the brain is the advanced cognitive center, which is mainly dominant in music, art, space, geometric figure and character face recognition and visual memory functions. The brain is the central nervous system of the human body, and damage to the nerve function of different parts of the brain will produce different clinical symptoms. Clinically, according to the patient’s clinical manifestations, physical examination, imaging diagnosis, etc., to clarify the location and nature of the lesion, and select the appropriate treatment plan.