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 structurally fixed, with neural pathways established during childhood remaining immutable. However, recent research has demonstrated that the brain retains a remarkable capacity for reorganization throughout life. This adaptability is driven by synaptic pruning and the formation of new neural connections in response to learning, experience, or injury. For instance, individuals who lose their sight often exhibit enhanced auditory or tactile processing, as the visual cortex is repurposed for other sensory modalities. Neuroplasticity also underpins cognitive rehabilitation after stroke, where undamaged brain regions can assume functions previously performed by damaged areas. While the mechanisms are complex, involving molecular cascades and environmental enrichment, the implications are profound: they challenge deterministic views of intelligence and offer hope for therapeutic interventions in neurological disorders.