Fig. 4: Receptive fields (RFs) of direct and indirect VPNs.
From: Diversity of visual inputs to Kenyon cells of the Drosophila mushroom body
A Region of visual space sampled by left eye ommatidia. Regions above (elevation > 0°) and below the equator (elevation <0°) represent the dorsal and ventral visual fields, respectively. B Top, estimated RFs of direct VPNs are overlaid. Darker shading, more synapses onto KCγ-d’s. Bottom, estimated RFs of indirect VPNs are overlaid. C Left, RF sizes of direct VPNs are plotted against the synapse sum onto KCγ-d’s. Right, RF sizes of indirect VPNs are plotted against the sum of synapses to LVINs. Pearson correlation coefficients for each neuropil are reported. D Left, centroids of direct VPN RFs. Circle size is proportional to total synapses made with KCγ-d’s. Right, centroids of indirect VPN RFs. Circle size is proportional to total synapses onto LVINs. E Approximate RF sizes of all VPNs from the left optic lobe. RF sizes are plotted against the sum of all output synapses. Correlation coefficients for each input neuropil are reported. F RF sizes for VPNs contacting KCγ-d’s in the left hemisphere (Lo (N = 18; center=200.5, lower bound=128, upper bound=272.5, lower whisker=90, upper whisker=463), Me (N = 18; center=260, lower bound=157.5, upper bound=393.25, lower whisker=22, upper whisker=606), aMe (N = 7; center=251, lower bound=224.5, upper bound=577, lower whisker=202, upper whisker=639)) and all VPNs in the brain receiving left optic lobe input (Lo (N = 2849; center=73, lower bound=52, upper bound=100, lower whisker=7, upper whisker=713), Me (N = 956; center=45, lower bound=31, upper bound=71, lower whisker=7, upper whisker=707), aMe (N = 65; center=113, lower bound=41, upper bound=312, lower whisker=8, upper whisker=639)). All samples are biologically independent cells examined over one independent experiment. Two-sided Student’s t-test: p = 1.734e-16 (Lo), p = 1.90e-23 (Me), p = 0.007 (aMe). G Effective RFs of five representative KCγ-d’s. Left, direct inputs, Right, indirect inputs. Data examine the RF properties of VPNs from the left optic lobe. Source data are provided as a Source Data file.
