How does the cortex stay flexible if input changes (example: blind or deaf individuals)?

The cortex can repurpose regions depending on input; for example, in blind people the visual cortex can become involved in hearing or touch tasks. This cross-modal plasticity demonstrates the cortex's adaptability and the importance of experience in shaping function. Timestamp: 585

What is the Ulisses Contract and how can I apply it to my life?

The Ulisses Contract is a concept where you bind your future self to a course of action you want to maintain, like locking up temptations or arranging social support. It helps prevent future self-sabotage by creating external commitments. Timestamp: 2552

Can AI be used to improve learning, and how would that work in practice?

AI can tailor instruction to individual learners, for example via AI debates that exhaustively explore both sides of an issue. It can grade logical arguments and help students develop critical thinking and creativity beyond what a single teacher could manage. Timestamp: 1485

What actually happens to our sense of time during dangerous events?

In life-threatening situations, people often remember more details due to increased memory density, but their perception of the event's duration is a memory reconstruction, not a faster perceptual frame rate. The fall experiment demonstrated this dissociation. Timestamp: 4112

What is the role of REM sleep and dreaming in brain plasticity?

REM sleep correlates with higher brain plasticity in infancy and stays relatively high in plastic brains; dreaming appears to be a mechanism by which the brain rehearses and protects the visual cortex by replaying patterns during dark periods. Timestamp: 6270

Do memories of traumatic events remain accurate over time?

Traumatic memories can drift and aren’t necessarily more accurate; memory recall can be reshaped by later information or retellings, which has important implications for eyewitness testimony. Timestamp: 6694

What is the difference between in-group and out-group empathy in the brain?

Neural empathy responses are stronger for in-group members and reduced for out-group members, illustrating a deep-seated bias that can influence real-world attitudes and actions. Timestamp: 7319

Are blind auditions a useful tool to reduce bias in hiring or selection?

Blind auditions remove visual information that could bias judgments, helping ensure talent is judged on performance rather than appearance or identity. Timestamp: 8096

What is 'complexification of relationships' and how can it reduce polarization?

Complexification introduces cross-cutting ties (e.g., shared affiliations that span multiple groups), making people more willing to listen across differences. Timestamp: 8119

How can I use novelty to future-proof my brain?

Regularly engaging with new experiences, skills, or environments keeps plasticity high by increasing novelty and memory encoding; small changes (e.g., a new route home) can have meaningful cognitive benefits. Timestamp: 1745

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

Andrew Huberman

Science & Technology6 min read145 min video

Jan 26, 2026|305,919 views|4,690|263

andrew huberman huberman lab podcast huberman podcast dr. andrew huberman neuroscience huberman lab andrew huberman podcast the huberman lab podcast science podcast

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Key Moments

TL;DR

Neuroplasticity, cortex, learning strategies, and future-self tricks for everyday life.

Key Insights

Neuroplasticity is an ongoing process: the brain continually rewires in response to new experiences and deliberate practice.

The cortex is a flexible, input-defined system; its function depends on what information it processes, not on fixed regional labels.

Cross-modal plasticity shows the brain repurposes unused real estate (e.g., in blindness or deafness) to enhance other senses or skills.

Early specialization vs. diversification: focused practice can build mastery, but varied experiences foster adaptability and long-term resilience.

Creativity and critical thinking are core future skills; education can cultivate them through curiosity-driven learning and remixing ideas.

Artificial intelligence can enable personalized, scalable learning and new ways to practice critical thinking and argumentation.

Future-self strategies (Ulissean contracts) help align current actions with long-term goals through social, financial, or environmental accountability.

Neurochemistry shapes plasticity: acetylcholine, dopamine, and other neuromodulators create windows for learning, but directed plasticity is essential.

Time perception under stress and memory formation reveal that high-arousal situations alter how we encode events and recall them later.

INTRODUCTION TO NEUROPLASTICITY

Neuroplasticity is the brain’s core capacity to rewire itself in response to experience and deliberate learning. Eagleman frames plasticity as the brain’s ongoing project of building an accurate model of the outside world, a model that’s refined by new information and challenged by unfamiliar tasks. The brain contains roughly 86 billion neurons, each forming thousands of connections that are continually remodeled. This remodeling is not random; it’s driven by the brain’s need for efficient, predictive processing. When predictions fail, attention and chemical signals (like catecholamines) help reallocate resources to relearn and adjust. The constant push toward novelty and challenge is what sustains plasticity across the lifespan, enabling us to acquire new skills, unlearn old habits, and adapt to changing environments.

CORTEX: FLEXIBILITY AND INPUT-DEFINED STRUCTURE

A central idea Eagleman emphasizes is that the cortex is not a fixed map of sensory regions but a flexible, six-layered computational platform whose function is defined by its inputs. If visual information wires into a given cortical area, that area becomes visual; if auditory input takes over, it can become auditory. This input-driven plasticity explains why the cortex is a single “one-trick pony” that can take on many roles depending on what information it processes. A famous example is Morgankaur’s ferret study, where visual input redirected to the auditory cortex produced visually responsive processing. This flexibility creates expansive computational real estate between input and output, allowing humans to simulate futures, plan, and adapt with higher-level cognition, a feature that underpins our unique capacity for complex behavior and decision-making.

CROSS-MODALITY AND SENSORY REORGANIZATION

Cross-modal plasticity demonstrates that when one sensory modality is absent or diminished, the brain reallocates cortical resources to enhance remaining senses. In people born blind, the visual cortex is repurposed for touch, hearing, and memory, leading to heightened tactile discrimination and auditory processing. Conversely, deaf individuals recruit auditory cortical areas to support visual or tactile tasks. These reorganizations show there is no unused cortical real estate; instead, the brain adapts by reallocating processing power to optimize function. This has implications for education and rehabilitation, underscoring the potential to train and harness neural plasticity to compensate for sensory limitations and to foster new skills in diverse learners.

EARLY EXPERIENCE AND THE VALUE OF DIVERSITY

The conversation discusses how early experiences shape lifelong capabilities, highlighting the trade-offs between early specialization and diversification. Extraordinary talents (e.g., Williams sisters, chess champions) often reflect intensive, early practice that engrains skills into the brain’s hardware. Yet there are cognitive benefits to broad exploration—learning languages, playing musical instruments, or trying multiple disciplines can expand cognitive flexibility and resilience. Studies suggest bilingualism can come with trade-offs in vocabulary size when languages compete for limited practice time, while musical training can reinforce auditory and motor integration. The key idea is to balance focused depth with strategic variety to cultivate a well-rounded neural toolkit.

CURRICULUM DESIGN, CURIOSITY, AND AI-ENABLED LEARNING

Eagleman argues that curiosity and engagement are powerful drivers of plasticity because they modulate the brain’s neuromodulatory systems. Modern education, aided by AI, can tailor learning to individual curiosity and pace, enabling deeper, faster learning. Practical proposals include AI-facilitated debates on controversial topics to strengthen critical thinking and understanding from multiple perspectives, and a final-period remix approach where students must reassemble foundational knowledge into original creations. The overarching message is to build curricula that reward curiosity, enable exploration, and teach students how to remix knowledge creatively, so they become capable thinkers in a rapidly changing world.

LANGUAGE, MUSIC, AND NEUROPLASTIC TOOLKITS

Language learning and musical training are highlighted as potent drivers of plasticity because they engage multiple sensory and cognitive systems simultaneously. Bilinguals and multilinguals develop enhanced cognitive flexibility, even if vocabulary per language may fluctuate with practice. Music and language training encourage cross-modal integration, auditory discrimination, and memory for sequences, all of which can transfer to other domains such as math, problem-solving, and social communication. The takeaway is that deliberate practice in language and music is not ornamental; it strengthens core neural networks that support reasoning, learning efficiency, and social interaction.

NEUROMODULATORS AND DIRECTED PLASTICITY

Plasticity is driven by a chorus of neuromodulators—acetylcholine, dopamine, norepinephrine, serotonin, and others—each shaping learning in context. Acetylcholine, in particular, signals novelty and prediction error, helping the brain rewire when expectations fail. While boosting neuromodulators can expand plasticity windows, the effect is nuanced: the brain’s networks become more or less receptive depending on where and when signals arrive. The important caveat is to pursue directed, task-specific plasticity rather than indiscriminate, global modulation, given the potential for unintended changes in behavior and risk-seeking or compulsive behaviors when dopamine is disproportionately elevated.

FUTURE SELF, ULISSES CONTRACTS, AND BEHAVIORAL CHANGE

A central theme is our capacity to think about and influence our future selves. The Ulisses Contract—binding the future self to safer, wiser choices today—appears in many forms: scheduling workouts with a friend, stacking social accountability, or putting money on the line to deter impulsive acts. Practical examples from the chat include gym buddies who motivate attendance, public commitments, and even using strategic restrictions (like a lockbox for devices) to reduce temptation. These strategies harness prefrontal control and social dynamics to align immediate actions with long-term goals, illustrating how we can design environments that support optimal decision-making.

TIME PERCEPTION, MEMORY, AND STRESS

The episode touches on how stress and memory interact, including why traumatic or highly emotional events often feel slowed down or more vivid in hindsight. Stress hormones modulate memory encoding and retrieval, shaping time perception and the salience of events. Such insights have practical implications for learning and trauma processing: high-arousal moments can create strong memories if encoded with adaptive strategies, and controlled re-exposure or reframing can help integrate difficult experiences. The discussion invites readers to consider how stress management, pacing, and rehearsal influence both what we remember and how we remember it.

Mentioned in This Episode

●Supplements

●Tools & Products

●Books

●Studies Cited

●People Referenced

Descriptive Cheat Sheet: Do's and Don'ts for Learning & Time Perception

Practical takeaways from this episode

Do This

Seek novelty: regularly challenge your brain with new tasks or skills to expand plasticity.

Create Ulisses-style contracts to align present and future self (e.g., lockbox, social commitments, or monetary stakes).

Foster critical thinking and creativity in daily life and education; use AI tools to practice debate and broader problem solving.

Schedule deliberate practice across multiple domains (language, music, physical skills) to maximize neural real estate.

Avoid This

Avoid only sticking to familiar puzzles or routines; push beyond comfort zones to keep brain wiring flexible.

Don’t rely solely on present-mocent gratification (e.g., endless scrolling); set boundaries and use friction to protect future self.

Avoid dehumanizing language or propaganda toward groups; seek cross-cutting relationships to reduce polarization.

Common Questions

Neuroplasticity is the brain's ongoing ability to rewire its circuits in response to experience and deliberate practice. It explains why practice changes performance and why challenging tasks help you build faster, more efficient neural pathways. Timestamp: 194

Topics

Learning Strategies Dreaming Cortex Cross-Modal Plasticity Future-Self Prefrontal Cortex Polarization Brain Training Time Perception Ulisses Contract Creativity Neuroplasticity Critical Thinking Memory Sleep

Mentioned in this video

supplementAG1

Vitamin/mineral/probiotic drink advertised; Huberman personally endorses AG1 and its sleep formula AGZ.

supplementAGZ

Sleep formula advertised as the speaker’s preferred sleep supplement.

toolAurora

Aurora countertop water filtration system sponsor; removes contaminants while preserving minerals.

personCrick

Mentioned alongside Watson in the DNA discovery context (text cites Crick/Waton).

bookEcholocation in Bats

Book discussed by Ed Young about sensory perception and echolocation.

personEd Catmull

Co-founder of Pixar; discussed in context of creative processing and brain networks.

personEd Young

Author mentioned as writer of Echolocation in Bats; referenced in sensory dialogue.

studyEnvironmental Working Group

EWG cited for a 2020 study estimating exposure to forever chemicals in tap water.

toolFunction Health

Health testing and data interpretation service sponsor; discussed in context of wellness metrics.

personGerta

German philosopher referenced with the roots vs wings metaphor for learning outcomes.

personJames Clear

Author referenced in relation to habit formation and routines (growth mindset context).

toolLingo

Time-management/learning tool advertised; includes a plan related to glucose and cognitive function.

supplementMatina Yerba Mate

Yerba Mate drink referenced as the user's preferred caffeine source and sponsor-supported product.

personMorgan(Kaur)

MIT researcher cited for a study where visual information was redirected to the auditory cortex.

personPolgar sisters

Chess champions cited as an example of intense practice shaping skill development.

studyScience

Reference to a Science study on early specialization in sport or creative endeavors.

personTiger Woods

Illustrative example of early specialization and eventual peak performance.

conceptUlisses contract

Narrative device from Odysseus (Ulisses) about binding the future self to resist temptation.

personWatton

Mentioned as the counterpart to Crick in the DNA discovery anecdote (text cites Watton).

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