Quantitative analysis of the responses of V1 neurons to horizontal disparity in dynamic random-dot stereograms

Quantitative analysis of the responses of V1 neurons to horizontal disparity in dynamic random-dot stereograms. J Neurophysiol 87: 191–208, 2002; 10.1152/jn.00465.2000. Horizontal disparity tuning for dynamic random-dot stereograms was investigated for a large population of neurons (n 787) in V1 of the awake macaque. Disparity sensitivity was quantified using a measure of the discrim-inability of the maximum and minimum points on the disparity tuning curve. This measure and others revealed a continuum of selectivity rather than separate populations of disparity- and nondisparity-sensi-tive neurons. Although disparity sensitivity was correlated with the degree of direction tuning, it was not correlated with other significant neuronal properties, including preferred orientation and ocular dom-inance. In accordance with the Gabor energy model, tuning curves for horizontal disparity were adequately described by Gabor functions when the neuron’s orientation preference was near vertical. For neu