Brains as Engines of Association: An Operating Principle for Nervous Systems | 2019

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Brains as Engines of Association: An Operating Principle for Nervous Systems | 2019

Brains as Engines of Association  tackles a fundamental question in neuroscience: what is the operating principle of the human brain?

While a similar question has been asked and answered for virtually every other human organ during the last few centuries, how the brain operates has remained a central challenge in biology. Based on evidence derived from vision, audition, speech and music–much of it based on the author’s own work over the last twenty years–Brains as Engines of Association argues that brains operate wholly on the basis of trial and error experience, encoded in neural circuitry over evolutionary and individual time.

This concept of neural function runs counter to current concepts that view the brain as a computing machine, and research programs based on the idea that the only way to answer such questions is by reconstructing the connectivity of brains in their entirety. This view also implies that the best way to understand the details of brain function is to recapitulate their history using artificial neural networks. While this viewpoint has received support in the last few years from work showing that computers can win complex games, the brain plays a much more complex game–the “game” of biological survival–which Purves concludes is based on trial-and-error experience.

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