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, with neural connections established during childhood remaining static. However, recent research demonstrates that the brain retains a remarkable ability to reorganize itself throughout life. This adaptability is driven by synaptic pruning, where unused neural pathways are eliminated, and by the strengthening of frequently used connections. Neuroplasticity is not only crucial for learning and memory but also underpins recovery after brain injuries, such as strokes. For instance, when one area of the brain is damaged, adjacent regions can sometimes take over its functions, a process facilitated by intensive rehabilitation. While this plasticity diminishes with age, it never ceases entirely. Consequently, lifelong engagement in mentally stimulating activities, such as learning a new language or playing a musical instrument, is recommended to maintain cognitive health. Nevertheless, scientists caution that neuroplasticity has limits; not all functions can be fully restored, and maladaptive plasticity can lead to chronic pain or phantom limb sensations.