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How to Build a BrainA Neural Architecture for Biological Cognition$
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Chris Eliasmith

Print publication date: 2013

Print ISBN-13: 9780199794546

Published to Oxford Scholarship Online: January 2014

DOI: 10.1093/acprof:oso/9780199794546.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 15 January 2021

. The Semantic Pointer Architecture

. The Semantic Pointer Architecture

(p.247) 7. The Semantic Pointer Architecture
How to Build a Brain

C. Eliasmith

X. Choo

Chris Eliasmith

Oxford University Press

As the final chapter of the first section of the book on methods for constructing SPA models, chapter 7 presents a large-scale model that integrates many of the examples presented previously. The result is what is currently the world’s largest functional brain model, called the Semantic Pointer Architecture Unified Network (Spaun). Spaun’s inputs are images, and its output is moving a physically modelled arm. The anatomical and functional elements of Spaun are described, and the model is shown to perform 8 different perceptual, motor, and cognitive tasks. It is compared to a wide variety of data from neuroscience and psychology. In the final section of the book, a unification of symbolic and probabilistic approaches to cognitive modeling that is consistent with the SPA is presented. Tutorial: Advanced modeling methods in Nengo

Keywords:   semantic pointer architecture, Spaun, large-scale modeling, cognitive modeling, probability theory

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