Fig. 1. Three main axes of brain disease categories during a lifespan. During the course of aging, the flexibility of living organisms and their ability to regenerate neuronal cells decreases. In the early stages of life, curable developmental diseases are the rule owing to the high plasticity and capacity for regeneration that prevail during this period. As people age and became adults, various mood-associated disorders dominate as the flexibility of the brain decreases owing to the stresses and pressure of life. Finally, in the later stages, the brain is rigid, reflecting the aging of our body. People at this stage often suffer from degenerative disorders, such as dementia and movement disorders.
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