Environmental enrichment contrasts with impoverishment. Which statement best describes their impact on brain development?

• A. Enriched environments promote greater cortical development, impoverished environments hinder it
• B. Enriched environments hinder development, impoverished promote it
• C. Both yield identical cortical development
• D. Enrichment has no effect on brain development

Answer: (A)

Environmental enrichment provides more sensory, motor, and social stimulation during development, driving brain plasticity in the cortex. With richer experiences, the cortex tends to show more dendritic branching, greater synapse formation, and often increased cortical thickness or weight. These changes reflect enhanced cortical development and more robust neural networks. In contrast, impoverished environments offer limited stimulation, leading to fewer synapses and slower or reduced cortical maturation. So, enrichment promotes greater cortical development while impoverishment hinders it, making that description the most accurate reflection of how experience shapes the developing brain. The other statements contradict the well-supported idea that neural development is shaped by environmental experience.