A Caltech Library Service

The dorsomedial cortical visual area: A third tier area in the occipital lobe of the owl monkey (aotus trivirgatus)

Allman, J. M. and Kass, J. H. (1975) The dorsomedial cortical visual area: A third tier area in the occipital lobe of the owl monkey (aotus trivirgatus). Brain Research, 100 (3). pp. 473-487. ISSN 0006-8993.

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item:


In the owl monkey, microelectrode mapping of Brodmann's area 19 indicates that this region contains part or all of at least 5 separate representations of the visual field, each of which adjoins the anterior border of V II and collectively are termed the third tier of cortical visual areas (V I is the first tier; V II is the second tier). Described in detail in this report is one of the third tier areas which is located on the dorsal surface and the adjacent medial wall of the occipital lobe and corresponds to a densely myelinated zone of cortex. In this dorsomedial area (DM), the representation of the horizontal meridian is partially split, and thus, like V II (see ref. 4) and the dorsolateral crescent5, DM is a second order transformation of the visual hemifield. In one abnormal owl monkey, a portion of the upper quadrant was represented twice in DM. This abnormal case may provide some clues as to how the normal pattern of visuotopic organization is established in the developing brain.

Item Type:Article
Related URLs:
URLURL TypeDescription
Additional Information:© 1975 Published by Elsevier. Accepted 30 June 1975. The experiments reported in this study were conducted at the Department of Neurophysiology, University of Wisconsin. We thank Dr. Leon Schmidt, Southern Research Institute, Birmingham, Alabama, for providing the owl monkeys used in this study. Mr. F. M. Miezin helped in some of the data collection. Histological materials were prepared by Mrs. I. Lucey and Mrs. J. Eckleberry. Figures were drawn by Ms. D. Urban, and photographic work was by Mr. T. Stewart. Dr. Joel Myerson and Ms. Evelynn McGuinness provided useful comments on the manuscript. Supported by NINDS Grants NS-05326, NS-06225, NS-12131; NSF Grant GB-36779; and an Alfred P. Sloan Fellowship to J.M.A.
Funding AgencyGrant Number
NIH Predoctoral FellowshipNS-05326
Alfred P. Sloan FoundationUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20200708-152148026
Persistent URL:
Official Citation:J.M. Allman, J.H. Kass, The dorsomedial cortical visual area: A third tier area in the occipital lobe of the owl monkey (aotus trivirgatus), Brain Research, Volume 100, Issue 3, 1975, Pages 473-487, ISSN 0006-8993,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104300
Deposited By: George Porter
Deposited On:09 Jul 2020 15:01
Last Modified:09 Jul 2020 15:01

Repository Staff Only: item control page