Fig. 4: Neuronal modulation of SC visuo-motor neurons related to spatial attention depends on the level of behavioral sensitivity and alignment of the neuron’s spatial response field with the attended stimulus location.
a A schematic illustrating the alignment of a neuron’s spatial RF and Gabor sample stimuli as measured by Mahalanobis distance. b Cumulative distributions of Mahalanobis distances (MD) between visuo-motor neurons’ RF (neurons, n = 129) and Gabor stimuli in two opposite hemifields, and between the two Gabor stimuli (47 sessions). c Linear regression fit for neuronal d’ (n = 129 neurons) as a function of the trial-averaged behavioral d’ within each session (Right; p = 0.0008) and the Mahalanobis distance between the RF and the Gabor stimulus in the same hemifield (Left, RF-GaborinRF; p = 0.0008). Dashed lines, 95% CI. d Variances explained by the RF-GaborinRF distance (MD) and behavioral d’ in the regression fit in (c). e Trials within each session were sorted according to behavioral d’ into four equal quantiles, and then session-averaged data is plotted for each quantile and monkey (monkey P, 27 sessions; monkey S, 20 sessions). f Trial-averaged neuronal d’ for visuo-motor neurons (n = 165) across four trial quantiles with increasing behavioral d’, compared using a repeated measures ANOVA (F(3, 492) = 9.04, p = 7.8 × 10–6). Error bars, ± 1 SEM.
