Science & Tools of Learning & Memory | Dr. David Eagleman

Quick Overview

Neuroplasticity, the brain's ability to constantly reconfigure its circuitry in response to experience, is maximized by constantly seeking novelty and challenging tasks one is not yet good at, as the brain stops changing once it achieves a successful model of the world; furthermore, adults can leverage 'Ulysses Contracts'—pre-commitment strategies like locking away temptation—to ensure their future selves adhere to beneficial long-term goals.

Key Points: Neuroplasticity involves the brain's 86 billion neurons constantly plugging, unplugging, and changing connection strengths, which is nature's trick allowing humans to absorb culture and build upon prior discoveries. The cerebral cortex is a 'one-trick pony' with universal circuitry; if visual information is plugged into the auditory cortex (as shown in ferret studies), the auditory cortex becomes visually responsive. Individuals born blind develop enhanced hearing and touch capabilities because the real estate allocated to the visual cortex is repurposed for tactile sensation and auditory processing. Early specialization, exemplified by the Williams sisters or chess champions, requires spending significant time burning the skill into the brain's hardware for efficiency, although bilingualism can lead to a lower vocabulary in both languages initially due to distributed practice. Accessing critical thinking involves practicing debates, like AI debates where one argues both sides of an issue to avoid ideological capture, while creativity stems from learning foundational material and then doing remixes, bends, and blends of that knowledge. To extend plasticity, one must 'seek novelty' and remain in the zone of being 'frustrating but achievable'; the religious orders study showed nuns who remained socially active and challenged late in life maintained cognitive function despite Alzheimer's pathology. Adults can implement 'Ulysses Contracts'—pre-commitments where the current self constrains the future self from acting on temptation—such as locking a phone away or using social pressure, exemplified by Ulysses tying himself to the mast to resist the sirens.