Fig. 8.

Visual receptive fields of RGCs that can be activated with and without bundle activation. Data in A–C, D–F, and G–I correspond to the retinal preparations described in the text with eccentricities of 48.2°, 58.1°, and 58.1°, respectively. A, D, and G represent the receptive fields of the cells that can be activated at their somas without activating other nearby somas. Receptive fields are separated into ON and OFF parasol cells, ON midget cells, and other cells, which include OFF midget cells, small bistratified cells, and cells for which the anatomical identity is unknown. B, E, and H represent the receptive fields of the cells that can be activated without activating bundles. C, F, and I show zoomed images of axon bundles in each preparation, with respect to a grid of electrodes (green overlay, arbitrary alignment) with spacing equal to that used in the experiments.