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After DigitalComputation as Done by Brains and Machines$
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James A. Anderson

Print publication date: 2017

Print ISBN-13: 9780199357789

Published to Oxford Scholarship Online: February 2018

DOI: 10.1093/acprof:oso/9780199357789.001.0001

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The Brain Doesn’t Work by Logic

The Brain Doesn’t Work by Logic

Chapter:
(p.107) Chapter 8 The Brain Doesn’t Work by Logic
Source:
After Digital
Author(s):

James A. Anderson

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199357789.003.0008

This chapter gives three examples of real neural computation. The conclusion is that the “brain doesn’t work by logic.” First, is the Limulus (horseshoe crab) lateral eye. The neural process of “lateral inhibition” tunes the neural response of the compound eye to allow crabs to better see other crabs for mating. Second, the retina of the frog contains cells that are selective to specific properties of the visual image. The frog responds strongly to the moving image of a bug with one class of selective retinal receptors. Third, experiments on patients undergoing neurosurgery for epilepsy found single neurons in several cortical areas that were highly selective to differing images, text strings, and spoken names of well-known people. In addition, new selective responses could be formed quickly. The connection to concepts in cognitive science seems inevitable. One possible mechanism is through associatively linked “cell assemblies.”

Keywords:   data representation, localized, distributed, grandmother cells, concepts, Limulus, frog eye, bug detectors Jennifer Aniston cells, Luke Skywalker cells

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