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. 2018 Aug 29;7:85–95. doi: 10.1016/j.isci.2018.08.019

Figure 4.

Figure 4

Response Properties of the Direction Selective Lobula Plate Interneuron LPi4-3

(A) Schematic of the Drosophila optic lobe with LPi4-3 highlighted.

(B) Comparison of spatial receptive field size of LPi4-3 cells recorded with iGluSnFR (left, n = 24 cells from 7 flies) or GCaMP6f (right, n = 14 cells from 5 flies). The responses of individual cells to flicker stimuli presented at 19 different columnar positions were averaged after alignment to the maximum (in black) and normalization. d, Dorsal; v, ventral; l, lateral; f, frontal.

(C) Time course of LPi4-3 response upon local flicker stimulation. The decay of the signal is faster for iGluSnFR response.

(D) LPi4-3 expressing iGluSnFR show glutamatergic direction selective responses (n = 8 cells from 5 flies). Five consecutive flicker stimuli were shown along the preferred (downward) or null (upward) direction of the neuron, acting as apparent motion. Shaded areas indicate mean ± SEM.