Livewired

Résumé du livre

David Eagleman is a neuroscientist and junior professor at Baylor College of Medicine who has written several popular science books, including Wednesday is Indigo Blue.

Matthew’s story of undergoing a hemispherectomy at age six to stop debilitating seizures exemplifies the brain’s extraordinary adaptability, or "livewiring." Despite losing half his brain, he recovered remarkably well, showcasing the brain’s ability to reorganize itself. This neuroplasticity is evident in how experiences shape the brain’s structure, especially during childhood when it is most malleable. Examples like blind individuals enhancing other senses, a two-legged dog learning to walk upright, or an archer mastering precision without arms highlight the brain’s capacity to adapt to necessity. This adaptability also drives innovations like brain-controlled prosthetics and sensory substitution technologies. However, the brain prioritizes efficiency, focusing only on tasks deemed essential—guided by chemicals like acetylcholine, which signal the need for rewiring. While neuroplasticity diminishes with age, as seen in the contrasting language adaptations of Mila Kunis and Arnold Schwarzenegger, studies like the Nun Study reveal that mental stimulation can preserve the brain’s flexibility even in later years. Ultimately, the brain’s ability to reshape itself is both a testament to its resilience and a reminder of the importance of motivation and necessity in driving progress.

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