雅思阅读

📖 Reading Passage

The concept of 'neuroplasticity' has revolutionized our understanding of the human brain. Historically, it was believed that the brain's structure was fixed after a critical period in childhood. However, recent research demonstrates that the brain remains capable of substantial reorganization throughout adulthood. This plasticity is not merely a passive response to injury but is actively engaged during learning and memory formation. For instance, studies on London taxi drivers have shown that navigating complex city streets leads to a measurable increase in the volume of the hippocampus, a region crucial for spatial memory. Such findings suggest that the brain's adaptability is a fundamental mechanism for acquiring new skills, but also imply that maladaptive plasticity could contribute to chronic pain or phantom limb sensations. Therefore, while neuroplasticity offers hope for rehabilitation after stroke or trauma, its double-edged nature necessitates careful therapeutic interventions.