What does redundancy in the brain refer to?

What does redundancy in the brain refer to?

• A. The brain's energy consumption.
• B. Excess neurons and synaptic connections that provide a buffer against loss.
• C. Uniform neuronal distribution.
• D. The exact number of neurons stays constant.

Answer: (B)

Redundancy in the brain means having extra neurons and synaptic connections beyond what’s strictly needed to carry out a function, providing multiple pathways and a backup capacity. This built‑in cushion lets other neurons or circuits compensate if some cells are damaged or lost, supporting preservation of function and recovery through plastic changes. It’s not about how energy is used, how neurons are distributed, or a fixed neuron count—numbers can change with development and experience, and the brain can reorganize after injury.

Redundancy in the brain means having extra neurons and synaptic connections beyond what’s strictly needed to carry out a function, providing multiple pathways and a backup capacity. This built‑in cushion lets other neurons or circuits compensate if some cells are damaged or lost, supporting preservation of function and recovery through plastic changes. It’s not about how energy is used, how neurons are distributed, or a fixed neuron count—numbers can change with development and experience, and the brain can reorganize after injury.