粉红色柔软的学习者

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• In the 1930s and ’40s, a neurosurgeon named Wilder Penfield... discovered that he could map the surface of the brain by stimulating different points... This led to the discovery of the 'homunculus'—a little man drawn across the surface of the brain. 在20世纪30和40年代，一位名叫维尔德·潘菲尔德的神经外科医生……发现他可以通过刺激不同的点来绘制大脑表面地图……这导致了“侏儒图”的发现——一个画在大脑表面上的小人。 -------------------------- How does the brain know which body parts are neighbors? ... The answer is timing. When you move your index finger, the sensors in the tip, the middle joint, and the base all fire at the same time... The brain assumes that any two areas that tend to fire at the same time must be neighbors. 大脑如何知道哪些身体部位是邻居？……答案是时间。当你移动食指时，指尖、中关节和指根的传感器会同时放电……大脑假设任何倾向于同时放电的两个区域必然是邻居。 -------------------------- When the researchers stroked the monk... (查看原文)

  Le Flaneur 7赞 2026-02-08 18:30:08

• When the first draft of the Human Genome Project came to completion at the turn of the millennium, one of the great surprises was that humans have only about twenty thousand genes... given the complexity of the brain and the body, it had been assumed that hundreds of thousands of genes would be required. 当人类基因组计划的第一份草案在千禧之交完成时，最重大的发现之一就是人类仅拥有大约2万个基因……考虑到大脑和身体的复杂性，此前人们一直认为需要数十万个基因。 With twenty thousand genes and 200 trillion connections between neurons, how could the details possibly be prespecified? That model could never have worked. Instead, neuronal networks require interaction with the world for their proper development. 只有2万个基因，却要对应200万亿个神经元连接，细节怎么可能被预先指定？那种模型根本行不通。相反，神经元网络需要与世界互动才能正常发育。 --------------------------------- The answer pivots on a clever strategy implemented by the... (查看原文)

  Le Flaneur 6赞 2026-02-08 18:06:16

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