Brain plasticity (neuroplasticity) is the brain's ability to change its structure and function across the lifespan by forming new neural connections, strengthening or weakening existing ones, and reorganizing after experience or injury.
Brain plasticity, also called neuroplasticity, is your brain's ability to physically change in response to experience, learning, and injury. It's not a fixed wiring diagram you're stuck with at birth. Neurons can form new connections, strengthen the useful ones, and let unused ones fade. This happens your whole life, though it's most dramatic when you're young.
In the AP Psych framework, plasticity shows up in a few places. It's the engine behind learning and memory (Unit 5), it explains how the developing brain adapts and reorganizes (Unit 3), and it's part of why the visual system can rewire when one pathway is damaged (Unit 3). The key idea: experience leaves a physical mark on the brain, and the brain reshapes itself around what you actually do and encounter.
Plasticity ties directly to how memory gets stored at the biological level, which is the core of topic 5.6 (Biological Bases of Memory). Every time you form a long-term memory, neurons are strengthening their connections. That's plasticity in action. It also supports the developmental theme that the brain isn't done growing in childhood. The growth mindset idea from learning objective AP Psych Revised 2.8.D, that intelligence can be malleable rather than fixed, leans on the same principle: if the brain can change, so can your abilities. Across these units, plasticity is the through-line connecting biology, learning, development, and recovery.
Keep studying AP Psychology Unit 2
Synaptic Pruning (Unit 3)
Pruning is plasticity's cleanup crew. As the brain develops, it deletes weak or unused synapses so the connections you actually use get more efficient. Plasticity isn't only about adding connections, it's also about trimming the ones you don't need.
Experience-dependent Plasticity (Unit 3)
This is the specific flavor of plasticity that responds to your unique experiences, like learning an instrument or a language. The brain you have at 20 is partly built by what you spent your time doing, which is why no two brains are wired exactly alike.
Biological Bases of Memory (Unit 5)
Memories don't float in some abstract storage drive. They're physical changes in neural connections, so when you remember something long-term, plasticity has literally restructured part of your brain to hold it.
Rehabilitation (Unit 5)
After a stroke or brain injury, recovery happens because healthy regions can take over functions the damaged area used to handle. That's plasticity doing rehab work, and it's why therapy after injury can rebuild lost skills.
Expect plasticity in multiple-choice stems about learning, memory, and recovery from injury. A common angle: empirical evidence that older adults CAN still learn new skills, which contradicts the myth that plasticity disappears with age. Plasticity declines but never vanishes. You may also see it paired with critiques of Piaget, where rigid developmental stages clash with the brain's ongoing flexibility. On free-response questions, you'd typically use plasticity to explain a behavioral outcome, like how someone recovered function after damage or why repeated practice physically changes the brain. The move is always the same: connect a real change in behavior or ability to a physical change in neural connections.
Plasticity is the broad umbrella, the brain's overall capacity to change. Synaptic pruning is one specific process under that umbrella, where the brain eliminates unused connections to streamline itself. Pruning is subtraction; plasticity also includes building and strengthening connections.
Brain plasticity is the brain's ability to change its structure and function across the entire lifespan, not just in childhood.
Forming long-term memories is a form of plasticity because it physically strengthens connections between neurons.
Plasticity declines with age but never fully stops, so older adults can absolutely still learn new skills.
Recovery after brain injury works because plasticity lets healthy regions take over lost functions.
The growth mindset idea, that intelligence is malleable rather than fixed, rests on the same principle that the brain can change.
It's the brain's ability to change its structure and function throughout life by forming new neural connections, strengthening useful ones, and reorganizing after experience or injury. On the exam it explains learning, memory, and recovery from brain damage.
No. Plasticity is strongest in childhood but continues for life. Empirical evidence shows older adults can still learn new skills, which directly contradicts the idea that an aging brain can't change.
Plasticity is the broad ability of the brain to change, while synaptic pruning is one specific process within it, where the brain eliminates unused connections to become more efficient. Pruning is one tool plasticity uses, not the whole concept.
When you store a long-term memory, neurons physically strengthen their connections. That structural change IS plasticity, which is why topic 5.6 treats memory as a biological process rooted in the brain's ability to rewire itself.
Growth mindset, the belief that intelligence is malleable rather than fixed, depends on the brain being able to change. Because plasticity lets practice and experience reshape neural connections, your abilities aren't locked in from birth.