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 largely fixed in structure and function after a critical period in childhood. However, recent research demonstrates that the brain retains a remarkable capacity for reorganization throughout life. This adaptability is driven by synaptic pruning and the formation of new neural connections, which occur in response to learning, experience, and even injury. For instance, when one sensory modality is lost, such as vision, the corresponding cortical areas may be recruited to process other senses, enhancing tactile or auditory acuity. This dynamic process is not unlimited; it is influenced by age, genetic factors, and the intensity of stimulation. Nevertheless, the implications are profound, suggesting that rehabilitation after stroke or brain injury can be optimized by targeted training, and that lifelong learning may help maintain cognitive health in aging populations.