The concept of 'neuroplasticity' has revolutionized our understanding of the human brain. Historically, scientists believed that the adult brain was largely fixed in structure and function after a critical period in childhood. However, research over the past few decades has demonstrated that the brain remains remarkably adaptable throughout life, capable of reorganizing neural pathways in response to learning, experience, or injury. This plasticity is not uniform; it varies by brain region and is influenced by factors such as age, intensity of training, and the nature of the stimulus. For instance, musicians who practice extensively show enlarged cortical areas dedicated to finger movement, while stroke victims can often regain lost functions by rerouting signals through undamaged regions. Despite these advances, the precise molecular mechanisms underlying plasticity remain incompletely understood, and translating this knowledge into effective clinical therapies poses significant challenges.
❓ Según el pasaje, ¿cuál de las siguientes afirmaciones refleja mejor la visión científica actual de la neuroplasticidad?
A. El cerebro adulto está completamente fijo y no puede cambiar después de la infancia.
B. La neuroplasticidad es uniforme en todas las regiones del cerebro y ocurre al mismo ritmo a lo largo de toda la vida.
C. El cerebro conserva cierta capacidad de reorganización, pero esta habilidad varía y no se comprende completamente a nivel molecular.
D. La plasticidad solo se observa en músicos y pacientes con accidente cerebrovascular, no en la población general.
✅ 正确答案
The brain retains some capacity for reorganization, but this ability varies and is not fully understood at a molecular level.
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