Extended Data Fig. 6: Chromatic response properties of pDm8 and yDm8 neurons.
From: Hue selectivity from recurrent circuitry in Drosophila
(a-d) Relative response amplitude of pDm8 (n= 333 ROIs, 7 flies) and yDm8 (n= 135 ROIs, 3 flies) across the gamut of tested fly colors. (a,b) Chromatic stimuli are represented as points in the chromatic tetrahedron, with the color of each point indicating the relative response of the indicated neuron to that stimulus. The color line that spans the edges of the tetrahedron from Rh3 to Rh4, Rh5 and Rh6 corresponed to the single wavelengths ranging from 300nm to 560nm. (c,d) Stimuli are represented as points in the 2D color opponent space, with the color of each point indicating the relative response of the indicated neuron to that stimulus. The solid black line corresponds to the single wavelength line, ranging across all single wavelengths from 330 to 530nm. (e,f) Min, ‘fly white’, and max responses of pDm8 and yDm8 as in Extended Data Fig. 1a-h. (g) Mean luminance invariance indices for Dm8 neurons (horizontal line). The boxes correspond to a vertical histogram of the bootstrapped distribution. (h) Mean sparsity indices for Dm8 neurons (horizontal line). The boxes correspond to a vertical histogram of the bootstrapped distribution. (i) Mean hue sensitivity indices for Dm8 neurons (horizontal line). The boxes correspond to a vertical histogram of the bootstrapped distribution. (j,k) Interpolated single wavelengths for Dm8s. The colored line corresponds to the interpolated mean response. The shaded areas correspond to the bootstrapped 95% percentile of the mean response. Tm5b and Tm5a single wavelength responses from Extended Data Fig. 1n,o are overlaid on pDm8 and yDm8 for comparison, respectively. (l,m) Interpolated non-spectral responses of Dm8s. The colored lines correspond to the interpolated mean responses for different non-spectral lines (as indicated in the legend). The shaded areas correspond to the bootstrapped 95% percentile of the mean response. (n) Comparison of different mean R2 values using standard linear regression, the LNL model, and the selectivity model for Dm8s. Mean R2 values are obtained using all the data and the error bar is the 95% confidence interval of fitting the models to bootstrap iterations of the data.
