雅思阅读

📖 Reading Passage

The concept of 'neuroplasticity' has revolutionized our understanding of the human brain. Contrary to the long-held belief that the adult brain is structurally fixed, research now demonstrates that neural pathways can be remodeled throughout life in response to learning, experience, and even injury. This adaptability is most pronounced during childhood, but it persists into old age, albeit with reduced efficacy. Studies involving London taxi drivers, who must memorize complex city layouts, revealed increased gray matter volume in the hippocampus, a region critical for spatial navigation. Such findings suggest that intense, sustained cognitive activity can physically alter brain structure. However, neuroplasticity is not inherently positive; maladaptive plasticity can contribute to chronic pain or phantom limb sensations. Understanding the mechanisms that govern this plasticity is crucial for developing therapeutic interventions for neurological conditions, such as stroke rehabilitation, where targeted exercises can encourage the brain to rewire itself and restore lost functions.