Why is adolescence tied to increased risk-taking from a neurodevelopmental perspective?

• A. Cerebellum controls reward
• B. Limbic system matures earlier than prefrontal cortex
• C. Prefrontal cortex matures earlier
• D. Hippocampus governs reward processing

Answer: (B)

During adolescence, reward-driven brain systems become more reactive while the control systems develop later. The limbic system, including regions like the amygdala and nucleus accumbens, matures earlier and heightens sensitivity to rewards and emotions. Meanwhile, the prefrontal cortex, which governs planning, impulse control, and weighing long-term consequences, matures more slowly. This mismatch—a stronger drive from limbic/reward circuits with still-under-construction regulatory control—helps explain why risk-taking tends to increase in adolescence.

The other options don’t fit because the cerebellum is mainly about movement and coordination, not reward processing; the hippocampus is key for memory, not reward; and the prefrontal cortex does not mature earlier, but rather later, which is why it doesn’t account for the rise in risk-taking.