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 circuits becoming rigid after a critical period in childhood. However, recent research demonstrates that the brain retains a remarkable capacity for reorganization throughout life. This adaptability is not merely a passive response to injury; it is an active process driven by learning and experience. For instance, studies on London taxi drivers reveal that their posterior hippocampus, a region associated with spatial navigation, is significantly larger than average, suggesting that intensive navigational practice physically alters brain structure. Such findings have profound implications for education and rehabilitation, implying that targeted mental exercises could potentially mitigate cognitive decline in aging populations. Nevertheless, experts caution that neuroplasticity has limits; it cannot fully compensate for severe damage or genetic disorders, and the brain's malleability decreases with age, albeit not entirely disappearing.