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Retinotopic organization of extrastriate cortex in the owl monkey—dorsal and lateral areas

Sereno, Martin I. and McDonald, Colin T. and Allman, John M. (2015) Retinotopic organization of extrastriate cortex in the owl monkey—dorsal and lateral areas. Visual Neuroscience, 32 . Art. No. e021. ISSN 0952-5238. PMCID PMC4733890. doi:10.1017/S0952523815000206.

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Dense retinotopy data sets were obtained by microelectrode visual receptive field mapping in dorsal and lateral visual cortex of anesthetized owl monkeys. The cortex was then physically flatmounted and stained for myelin or cytochrome oxidase. Retinotopic mapping data were digitized, interpolated to a uniform grid, analyzed using the visual field sign technique—which locally distinguishes mirror image from nonmirror image visual field representations—and correlated with the myelin or cytochrome oxidase patterns. The region between V2 (nonmirror) and MT (nonmirror) contains three areas—DLp (mirror), DLi (nonmirror), and DLa/MTc (mirror). DM (mirror) was thin anteroposteriorly, and its reduced upper field bent somewhat anteriorly away from V2. DI (nonmirror) directly adjoined V2 (nonmirror) and contained only an upper field representation that also adjoined upper field DM (mirror). Retinotopy was used to define area VPP (nonmirror), which adjoins DM anteriorly, area FSTd (mirror), which adjoins MT ventrolaterally, and TP (mirror), which adjoins MT and DLa/MTc dorsoanteriorly. There was additional retinotopic and architectonic evidence for five more subdivisions of dorsal and lateral extrastriate cortex—TA (nonmirror), MSTd (mirror), MSTv (nonmirror), FSTv (nonmirror), and PP (mirror). Our data appear quite similar to data from marmosets, though our field sign-based areal subdivisions are slightly different. The region immediately anterior to the superiorly located central lower visual field V2 varied substantially between individuals, but always contained upper fields immediately touching lower visual field V2. This region appears to vary even more between species. Though we provide a summary diagram, given within- and between-species variation, it should be regarded as a guide to parsing complex retinotopy rather than a literal representation of any individual, or as the only way to agglomerate the complex mosaic of partial upper and lower field, mirror- and nonmirror-image patches into areas.

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Additional Information:© 2015 Cambridge University Press. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (, which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited. Received February 5, 2015; Accepted May 20, 2015. Part of a collection on Controversial Issues in Visual Cortex Mapping. The authors thank Mark O'Dell and EveLynn McGuinness for participating in some of these long experiments, Miriam Rusch and Kristi Wilson for animal care, and Claudia Fernety and two reviewers for detailed comments on the manuscript. Supported by NIH MH47035, UCSD McDonnell-Pew Cognitive Neuroscience Center, NIH MH081990, and a Royal Society Wolfson Research Merit Award. Correspondence should be addressed to or
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UCSD McDonnell-Pew Cognitive Neuroscience CenterUNSPECIFIED
Subject Keywords:Retinotopy, Polar angle, Eccentricity, Visual field sign, Owl monkey
PubMed Central ID:PMC4733890
Record Number:CaltechAUTHORS:20160128-103713549
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Official Citation:MARTIN I. SERENO, COLIN T. MCDONALD and JOHN M. ALLMAN (2015). Retinotopic organization of extrastriate cortex in the owl monkey—dorsal and lateral areas. Visual Neuroscience, 32, E021 doi:10.1017/S0952523815000206.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64042
Deposited By: Ruth Sustaita
Deposited On:28 Jan 2016 23:28
Last Modified:10 Nov 2021 23:25

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