雅思阅读

📖 Reading Passage

The concept of 'neuroplasticity' has revolutionized our understanding of the human brain. Historically, scientists believed that the adult brain was relatively fixed, with neural circuits formed during childhood remaining largely immutable. However, recent research demonstrates that the brain retains a remarkable capacity for reorganization throughout life. This adaptability is driven by synaptic strengthening, the formation of new neural pathways, and, in certain regions, the generation of new neurons. Neuroplasticity is not merely a passive response to injury; it is actively engaged during learning, memory formation, and even recovery from stroke. For instance, when one sensory modality is lost, such as vision, the corresponding cortical areas may be recruited to process other senses, enhancing their acuity. This dynamic process is influenced by experience, environmental enrichment, and deliberate practice, suggesting that cognitive abilities are not fixed but can be cultivated. Nevertheless, the extent of plasticity varies with age, being most pronounced in critical developmental periods but persisting, albeit to a lesser degree, in adulthood.