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The case for primate V3

Lookup NU author(s): Dr Jason Connolly

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Abstract

The visual system in primates is represented by a remarkably large expanse of the cerebral cortex. While more precise investigative studies that can be performed in non-human primates contribute towards understanding the organization of the human brain, there are several issues of visual cortex organization in monkey species that remain unresolved. In all, more than 20 areas comprise the primate visual cortex, yet there is little agreement as to the exact number, size and visual field representation of all but three. A case in point is the third visual area, V3. It is found relatively early in the visual system hierarchy, yet over the last 40 years its organization and even its very existence have been a matter of debate among prominent neuroscientists. In this review, we discuss a large body of recent work that provides straightforward evidence for the existence of V3. In light of this, we then re-examine results from several seminal reports and provide parsimonious re-interpretations in favour of V3. We conclude with analysis of human and monkey functional magnetic resonance imaging literature to make the case that a complete V3 is an organizational feature of all primate species and may play a greater role in the dorsal stream of visual processing.


Publication metadata

Author(s): Lyon DC, Connolly JD

Publication type: Review

Publication status: Published

Journal: Proceedings of the Royal Society B: Biological Sciences

Year: 2012

Volume: 279

Issue: 1729

Pages: 625-633

Print publication date: 14/12/2011

ISSN (print): 0962-8452

ISSN (electronic): 1471-2954

Publisher: ROYAL SOC

URL: http://dx.doi.org/10.1098/rspb.2011.2048

DOI: 10.1098/rspb.2011.2048


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