Which statement best defines pruning in neural development?

Which statement best defines pruning in neural development?

• A. The brain's ability to form new connections
• B. The elimination of unused neural connections
• C. The brain's capacity to generate new neurons
• D. The strengthening of all connections regardless of use

Answer: (B)

Pruning in neural development refers to the elimination of unused neural connections to streamline brain networks. Early on the brain forms many more synapses than it ultimately needs, and through experience and activity those connections that are rarely used are weakened and removed, while frequently activated pathways are preserved and refined. This makes neural processing more efficient and reduces energy costs. It’s not about forming new connections (synaptogenesis), generating new neurons (neurogenesis), or strengthening all connections indiscriminately; pruning selectively removes the underused ones to tune circuits to the organism’s environment.

Pruning in neural development refers to the elimination of unused neural connections to streamline brain networks. Early on the brain forms many more synapses than it ultimately needs, and through experience and activity those connections that are rarely used are weakened and removed, while frequently activated pathways are preserved and refined. This makes neural processing more efficient and reduces energy costs. It’s not about forming new connections (synaptogenesis), generating new neurons (neurogenesis), or strengthening all connections indiscriminately; pruning selectively removes the underused ones to tune circuits to the organism’s environment.