Axons

The corpus callosum is a commissural fibre tract of roughly 200 million axons connecting the two cerebral hemispheres of the placental mammalian brain, enabling interhemispheric transfer of sensory, motor, and cognitive information. It is the largest white-matter structure in the brain.

Neuroplasticity is the capacity of the nervous system to modify its structure and function in response to experience, activity, injury, or environmental change. It encompasses processes at multiple scales — from molecular changes within individual synapses to large-scale cortical reorganisation — and operates throughout the lifespan, though its mechanisms and scope change with age.