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23 Problems in Systems Neuroscience$
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J. Leo van Hemmen and Terrence J. Sejnowski

Print publication date: 2006

Print ISBN-13: 9780195148220

Published to Oxford Scholarship Online: May 2009

DOI: 10.1093/acprof:oso/9780195148220.001.0001

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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: 22 October 2021

What Is the Other 85 Percent of V1 Doing?

What Is the Other 85 Percent of V1 Doing?

(p.182) 10 What Is the Other 85 Percent of V1 Doing?
23 Problems in Systems Neuroscience

Bruno A. Olshausen

David J. Field

Oxford University Press

The primary visual cortex (area V1) of mammals has been the subject of intense study for at least four decades. This chapter identifies five fundamental problems with the reductionist approach that have led to the current view of V1 as a Gabor filter bank. It considers two important factors: an estimate of the fraction of V1 neuron types that have actually been characterized and the fraction of variance explained in the responses of these neurons under natural viewing conditions. Together, these show that at present we can rightfully claim to understand only 10 to 20% of how V1 actually operates under normal conditions. The goal in pointing out these things is not simply to tear down the current framework, but rather to make room for new theories that are essential for understanding V1 and its relation to perception.

Keywords:   V1, brain, primary visual cortex, Gabor filter bank, neurons

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