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The organization of the second visual area (V II) in the owl monkey: A second order transformation of the visual hemifield

Allman, J. M. and Kaas, J. H. (1974) The organization of the second visual area (V II) in the owl monkey: A second order transformation of the visual hemifield. Brain Research, 76 (2). pp. 247-265. ISSN 0006-8993. https://resolver.caltech.edu/CaltechAUTHORS:20200708-152148248

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Abstract

The visuotopic organization of the second visual area (V II) in the owl monkey was mapped by determining the receptive field positions for single neurons and small clusters of neurons recorded with microelectrodes. Our data indicate that V II is a long narrow strip of cortex which appears to correspond to area 18 of Brodmann8. The results also indicate that the topological transformation of the visual field in V II is fundamentally different from that in the primary visual area (V I). In V I, adjacent loci in the contralateral half of the visual field are always represented in adjacent cortical loci, and thus V I is a simple topological representation which we refer to as afirst order transformation of the visual hemifield. In contrast, adjacent loci in the contralateral hemifield arenot always represented in adjacent loci in V II. Beyond the central 7° in V II, the representation of the horizontal meridiansplits to form most of the anterior border of V II, and the upper and lower quadrants of the visual field are represented separately. Thus, two adjoining parts of the visual field on each side of the horizontal meridian can be represented in quite separate parts of V II. We refer to V II as asecond order transformation of the visual hemifield and suggest that V II serves as a functional adjunct to V I.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/0006-8993(74)90458-2DOIArticle
Additional Information:© 1974 Published by Elsevier. Accepted 4 March 1974. We thank Dr. Leon Schmidt, Southern Research Institute, Birmingham, Alabama for providing the owl monkeys used in this study. Histological materials were prepared by Mrs. I. Lucey and Mrs. J. Ekleberry. Figures were drawn by Ms. D. Urban and photographic work was by Mr, T. Stewart. We thank Dr. R. W. Guillery for providing helpful comments on the manuscript and Dr. R. H. Lane for assisting during some of the experiments. This study was supported by NINDS Grants NS-05326 and NS-06225, NICHD Grant HD-03352, and NSF Grant GB-36779. NOTE ADDED IN PROOF: After submitting this paper, a report on area 18 of the cat appeared. According to Tusa, the lateral border of area 18 in the cat does not correspond to the horizontal meridian and the most temporal part of the visual hemifield does not appear to be represented in area 18. Also, we have briefly described another third tier visual area forming part of the anterior border of VII of the owl monkey.
Funders:
Funding AgencyGrant Number
NIH Predoctoral FellowshipNS-05326
NIHNS-06225
NIHHD-03352
NSFGB-36779
Issue or Number:2
Record Number:CaltechAUTHORS:20200708-152148248
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200708-152148248
Official Citation:J.M. Allman, J.H. Kaas, The organization of the second visual area (V II) in the owl monkey: A second order transformation of the visual hemifield, Brain Research, Volume 76, Issue 2, 1974, Pages 247-265, ISSN 0006-8993, https://doi.org/10.1016/0006-8993(74)90458-2.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104302
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:09 Jul 2020 15:05
Last Modified:09 Jul 2020 15:05

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