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Visual response properties of neurons in four extrastriate visual areas of the owl monkey (Aotus trivirgatus): a quantitative comparison of medial, dorsomedial, dorsolateral, and middle temporal areas

Baker, James F. and Petersen, Steven E. and Newsome, William T. and Allman, John M. (1981) Visual response properties of neurons in four extrastriate visual areas of the owl monkey (Aotus trivirgatus): a quantitative comparison of medial, dorsomedial, dorsolateral, and middle temporal areas. Journal of Neurophysiology, 45 (3). pp. 397-416. ISSN 0022-3077. https://resolver.caltech.edu/CaltechAUTHORS:20200708-152147159

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Abstract

1. The response properties of 354 single neurons in the medial (M), dorsomedial (DM), dorsolateral (DL), and middle temporal (MT) visual areas were studied quantitatively with bar, spot, and random-dot stimuli in chronically implanted owl monkeys with fixed gaze. 2. A directionality index was computed to compare the responses to stimuli in the optimal direction with the responses to the opposing direction of movement. The greater the difference between opposing directions, the higher the index. MT cells had much higher direction indices to moving bars than cells in DL, DM, and M. 3. A tuning index was computed for each cell to compare the responses to bars moving in the optimal direction, or flashed in the optimal orientation, with the responses in other directions or orientations within +/- 90 degrees. Cells in all four areas were more sharply tuned to the orientation of stationary flashed bars than to moving bars, although a few cells (9/92( were unresponsive in the absence of movement. DM cells tended to be more sharply tuned to moving bars than cells in the other areas. 4. Directionality in DM, DL, and MT was relatively unaffected by the use of single-spot stimuli instead of bars; tuning in all four areas was broader to spots than bars. 5. Moving arrays of randomly spaced spots were more strongly excitatory than bar stimuli for many neurons in MT (16/31 cells). These random-dot stimuli were also effective in M, but evoked no response or weak responses from most cells in DM and DL. 6. The best velocities of movement were usually in the range of 10-100 degrees/s, although a few cells (22/227), primarily in MT (14/69 cells), preferred higher velocities. 7. Receptive fields of neurons in all four areas were much larger than striate receptive fields. Eccentricity was positively correlated with receptive-field size (r = 0.62), but was not correlated with directionality index, tuning index, or best velocity. 8. The results support the hypothesis that there are specializations of function among the cortical visual areas.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1152/jn.1981.45.3.397DOIArticle
Additional Information:© 1981 the American Physiological Society. Received 15 July 1980; accepted in final form 30 September 1980. We thank Leslie Wolcott for drawing the figures. This research was supported by National Institutes of Health Grants NS-00178, NS-12131, and GM-07737; National Science Foundation Grant BNS-77-15605, and the Pew Memorial Trust.
Funders:
Funding AgencyGrant Number
NIHNS-00178
NIHNS-12131
NIHGM-07737
NSFBNS-77-15605
Pew Memorial TrustUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20200708-152147159
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200708-152147159
Official Citation:Visual response properties of neurons in four extrastriate visual areas of the owl monkey (Aotus trivirgatus): a quantitative comparison of medial, dorsomedial, dorsolateral, and middle temporal areas J. F. Baker, S. E. Petersen, W. T. Newsome, and J. M. Allman Journal of Neurophysiology 1981 45:3, 397-416
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104294
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:09 Jul 2020 14:51
Last Modified:09 Jul 2020 14:51

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