Extended Data Fig. 7: T4d neuron analysis.
From: Eye structure shapes neuron function in Drosophila motion vision
Related to Fig. 4. a, T4d PDs mapped to eye coordinates. b, Interpolated T4d PD field (arrows are rescaled to 50% of length in a). c, The T4d PD field from b replotted using Mercator projection. d, Visual angles subtended by T4d PD vectors (i.e., angular size). Scatter plots show the reconstructed T4d PDs (black dots, also in a) and interpolated ones (blue dots, also in b) along the equator (+/−15° horizontal shaded band) and the central meridian (+/−15° vertical shaded crescent). e, Angular differences between T4d PD field, -v-axis, three cardinal self-motion optic-flow fields (lift, leftward roll, and upward pitch), and optimized self-motion flow fields, represented as median +/- quartiles. f, Spatial distribution of angular differences between T4b PD field and the three cardinal self-motion optic-flow fields. g, Comparison of our anatomically predicted T4b PD field (brown arrows) and the H2 local PDs (red arrowheads) from the current study to the measured T4b PDs in a recent study27 that subdivided these measurements into two candidate subtypes. To compare all T4b PD measurements, we compute the vector means for each type within the magenta box in 10° strips (horizontal and vertical) and plot these along the margins. In many retinal positions, we find reasonable agreement between the T4b anatomical PDs and the measured T4b.I data (e.g., the discrepancy could be due to global head alignment differences). The T4b.II data do not match the T4b anatomical PDs at any location.
