Receptive fields of disparity-selective neurons in macaque striate cortex

  • A Correction to this article was published on 01 April 2000

Abstract

To identify neuronal mechanisms underlying stereopsis, we characterized interactions between inputs from the two eyes in disparity-selective neurons in macaque V1. All disparity-selective cells showed suppressive interactions between the right and left eyes, and some showed facilitatory interactions. Disparity selectivity was narrower than the receptive-field width and was constant across the receptive field. Such position-invariant disparity selectivity is also found in anesthetized cat V1. Complex cells have been suggested to inherit their disparity selectivity from simple cells with receptive fields mismatched between the two eyes. However, we found no such antecedent disparity-tuned simple cells. We did find disparity-selective cells with some simple-cell characteristics, but surprisingly, they also showed position-invariant disparity selectivity rather than simple linear binocular interactions.

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Figure 1: Objects nearer or farther than the plane of fixation cast images on noncorresponding parts of the two retinae; arrowheads indicate corresponding positions.
Figure 2: Responses from a 'tuned near' complex cell.
Figure 3: Reverse-correlation binocular-response maps corrected for eye position (top row) and binocular nonlinear interaction maps (bottom row) at 60 ms before each spike for a 'tuned far' complex cell recorded in alert macaque V1.
Figure 4: Elongation ratio and angle of the peak region in binocular response maps for all disparity-tuned cells in this study in addition to 27 non-stereo cells.
Figure 5: Reverse-correlation binocular-response maps corrected for eye position and binocular non-linear interaction maps for a 'tuned inhibitory' cell.
Figure 6: Reverse-correlation binocular-response maps corrected for eye position for four cells with spatially offset light- and dark-excitatory response regions.
Figure 7: (a) Optimum horizontal disparities (determined from binocular response maps) as functions of spatial offset of the peaks in the two eyes' receptive fields for complex cells and for spatially offset cells.

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Acknowledgements

This work was funded by NIH grant EY10203. David Freeman did the computer programming. Gail Robertson provided technical assistance. Clay Reid, Bevil Conway, Terrence Sejnowski, Rajesh Rao, Niall McLoughlin, Bartlett Mel and Tomaso Poggio provided suggestions on the manuscript.

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Correspondence to Margaret S. Livingstone.

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Livingstone, M., Tsao, D. Receptive fields of disparity-selective neurons in macaque striate cortex . Nat Neurosci 2, 825–832 (1999). https://doi.org/10.1038/12199

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