雅思阅读

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The concept of neuroplasticity has revolutionized our understanding of the human brain. Previously, scientists believed that the adult brain was largely fixed in its structure and function after a critical period in childhood. However, recent research demonstrates that the brain remains highly adaptable throughout life, capable of reorganizing neural pathways in response to learning, experience, or injury. This plasticity is not uniform; it varies across different brain regions and is influenced by factors such as age, environmental enrichment, and stress. For instance, musicians who practice extensively show enlarged cortical areas dedicated to finger movement, while stroke patients can sometimes recover lost functions by recruiting adjacent brain areas. Despite these advances, the precise molecular mechanisms underlying synaptic strengthening and pruning remain incompletely understood, posing a significant challenge for developing targeted therapies for neurological disorders.