Chapter

What Is the Other 85 Percent of V1 Doing?

Bruno A. Olshausen and David J. Field

in 23 Problems in Systems Neuroscience

Published in print January 2006 | ISBN: 9780195148220
Published online May 2009 | e-ISBN: 9780199864676 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195148220.003.0010

Series: Computational Neuroscience Series

 What Is the Other 85 Percent of V1 Doing?

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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

Chapter.  12461 words.  Illustrated.

Subjects: Neuroscience

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