Applying Super-Resolution and Tomography Concepts to Identify Receptive Field Subunits in the Retina
Fig 6
Variations to the model structure.
(A) Receptive field and subunits (left) of a model with two superimposed subunit layouts (black and green ellipses, respectively), each consisting of ten subunits. Measurements with Ricker stripes (center) yields reconstructions depicted for rate responses and spiking responses (right). Arrows highlight subunits/hotspots described in main text. (B) Same as (A), but for a model with two layouts of differently sized subunits, one containing four subunits (left, black ellipses) and one containing 16 subunits (green ellipses). Measurements with wide Ricker stripes (top row) lead to different reconstructions (right) than measurements with narrow stripes (bottom row). (C) Same as (A), but for a model with one On (black ellipses) and one Off (green ellipses) subunit layout. The depicted receptive field is for On-type stimulation. Measurements with stripes of different polarity (top and bottom row) lead to different reconstructions. (D) Depiction of an LNLNLN model with Gaussian photoreceptors (blue ellipses, representing 1.5 σ contours). Green lines display the connection weights between photoreceptors and subunits by their width.