The quantity of white matter-mylenated axons-increases dramatically during adolescence, while, at the same time, the quantity of gray matter-the slower, unmylenated axons-generally decreases in density.

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During adolescence, the brain undergoes significant structural changes, including an increase in white matter (myelinated axons) which improves the efficiency of neural transmission. Concurrently, there is a pruning process where the density of gray matter (unmyelinated axons and neuron cell bodies) is reduced, refining neural networks for more efficient processing.

The Quantity of White Matter-Mylenated Axons-Increases Dramatically During Adolescence, While