Synaptic pruning is best described as what?

• A. Elimination of unused neural connections
• B. Creation of new neural connections irrespective of use
• C. Myelination of all neurons
• D. Generation of new neurons in adulthood

Answer: (A)

Synaptic pruning is the brain's way of trimming away neural connections that are rarely used, leaving a lean, efficient network. This refinement occurs during development and continues through adolescence, guided by neural activity and experience. It best fits as elimination of unused neural connections because pruning selectively removes weaker or redundant synapses rather than creating new ones or broadly altering myelination. Creating new connections irrespective of use describes synaptogenesis, not pruning. Myelination speeds up signaling and is a separate maturation process. Generating new neurons in adulthood refers to neurogenesis, which is limited to certain regions and doesn't describe removal of synapses. Through pruning, the brain enhances signal-to-noise and functional specialization.