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. Author manuscript; available in PMC: 2017 Aug 8.
Published in final edited form as: Curr Biol. 2016 Jul 7;26(15):1935–1942. doi: 10.1016/j.cub.2016.05.051

Figure 1.

Figure 1

The electrical image of ON parasol cells reveals unexpected radially propagating axons. A. Mosaic of simultaneously recorded ON parasol cell receptive fields (top) (scale bar 200 μm), overlaid spike-triggered average response time course (lower left) and autocorrelation of firing (lower right). B. Electrical image of a single ON parasol cell (marked dark gray in A), on the multi-electrode array (32×16 electrodes, 60 μm spacing). Size of disk and gray value represent minimal voltage deflection on each electrode. Largest amplitudes are saturated to increase visibility of PAC axons. C. Average voltage traces of electrodes marked in B during a recorded spike in the ON parasol cells, with characteristic somatic (trace 1) and axonal waveforms of ON parasol cell (trace 2) and PAC (trace 3–7). Blue and red regions indicate times before and after a time point 0.85 ms after the largest negative voltage deflection at the soma. D. Electrical image before (blue) and after (red) a time point 0.85 ms after minimal voltage deflection, revealing distinct spatial patterns.