Fig 10. Summary of response measures from area-response curves with triadic inhibition present.

(A) Ratio of receptive-field center diameter of relay cell (RC) and (central) retinal ganglion cell (GC), $d_{\text{c}}^{\text{R}}/d_{\text{c}}^{\text{G}}$; receptive-field center diameter measured as the spot diameter corresponding to the largest firing rate in the area-summation curves in Fig 9. (B) Ratio of receptive-field center diameter of interneuron (IN) and relay cell (RC), $d_{\text{c}}^{\text{I}}/d_{\text{c}}^{\text{R}}$. (C) Relay-cell α_R (solid) and interneuron α_I (dashed) center-surround antagonisms, cf. Eq 7. (D) Maximal firing rate r_c, i.e., firing rate for spot exactly covering receptive-field center, for relay cell ($r_{\text{c}}^{\text{R}}$, solid) and interneuron ($r_{\text{c}}^{\text{I}}$, dashed). The colored lines correspond to different values of w_GIp, see legend below panels. Note also that interneuron (IN) results are absent for the case with w_GIp = 0 (blue lines) since in this case the IN only receives triadic input and does not fire any action potentials.