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 forming only during critical periods of childhood. However, recent research demonstrates that the brain retains a remarkable capacity for reorganization throughout life. This plasticity is evident in phenomena such as the recovery of function after stroke, where adjacent brain regions can assume the roles of damaged areas. Moreover, environmental enrichment, cognitive training, and even meditation have been shown to induce measurable changes in gray matter density and synaptic connectivity. These findings challenge the traditional dichotomy between 'hardwired' and 'flexible' neural structures, suggesting instead that plasticity is a fundamental property of the nervous system. Nevertheless, the extent of plasticity varies by age and brain region, and the mechanisms underlying these changes remain incompletely understood, prompting ongoing investigation into their potential therapeutic applications.