Which neural process involves trimming unnecessary synapses to improve processing efficiency during development?

Which neural process involves trimming unnecessary synapses to improve processing efficiency during development?

• A. Expansion of synapses
• B. Neurogenesis
• C. Synaptic pruning
• D. Myelination

Answer: (D)

Synaptic pruning is the process where the brain trims away unnecessary synapses during development to streamline neural networks and boost processing efficiency. Early in development there are far more synapses than the mature brain needs. Through activity-dependent refinement, connections that are frequently used are kept, while those that are weak or rarely activated are eliminated. This pruning, aided by glial cells such as microglia, sharpens circuits, reduces noise, and allows signals to travel more quickly and reliably. Myelination speeds up transmission by insulating axons but does not remove synapses, so it’s a different way the brain becomes more efficient. Expanding synapses would increase connections rather than prune them, and neurogenesis is about creating new neurons, not trimming synapses. The described process is synaptic pruning.

Synaptic pruning is the process where the brain trims away unnecessary synapses during development to streamline neural networks and boost processing efficiency. Early in development there are far more synapses than the mature brain needs. Through activity-dependent refinement, connections that are frequently used are kept, while those that are weak or rarely activated are eliminated. This pruning, aided by glial cells such as microglia, sharpens circuits, reduces noise, and allows signals to travel more quickly and reliably. Myelination speeds up transmission by insulating axons but does not remove synapses, so it’s a different way the brain becomes more efficient. Expanding synapses would increase connections rather than prune them, and neurogenesis is about creating new neurons, not trimming synapses. The described process is synaptic pruning.