Geriatric brain atrophy is a common clinical condition, which is divided into mild brain atrophy, moderate brain atrophy and severe brain atrophy according to the onset and clinical manifestations, with the following specific symptoms: 1. mild brain atrophy manifests as no symptoms or slight dizziness, headache, memory impairment, decreased attention, etc.; 2. moderate brain atrophy manifests as obvious memory impairment, slow reaction, inattention, difficulty in completing more complex movements or inability to make comprehensive judgments, etc.; 3. severe brain atrophy manifests as mental behavior disorder, dementia, or even paralysis, bedridden, etc.