Summary

alzheimer_disease is a progressive_neurodegeneration and the most common cause of dementia in older adults. Hallmarks include amyloid_plaques and neurofibrillary_tangles. Typical features are memory_loss, cognitive_decline, trouble with daily activities, and behavior_changes. Onset usually occurs after 65; advanced_age and family_history increase risk. Diagnosis relies on history and cognitive_testing, with imaging used to support findings. The course is slowly_progressive and leads to increasing functional dependence over time.