Table 1.

Parameters used in the simulations

	ς_c/deg	ς_s/deg	E_rev,inh(mV)	τ (msec)
Horizontal cell	0.72^1-a	—	—	20
Bipolar cell	0.12^1-b	0.72^1-c	−70^1-d	10
Transient bipolar cell terminal	0.12^1-e	0.72^1-e	−70^1-f	10
Wide-field amacrine cell	0.50	—	−70^1-g	10
Narrow-field amacrine cell	0.12	0.50	−70^1-h	10
Type-1 amacrine cell	0.12	—	—	10
X-ganglion cell	0.18^1-i	0.59^1-j	−70^1-k	10
Y-ganglion cell	0.50^1-i	1.65^1-j	−70^1-k	10

The receptive field center (ς_c) and surround (ς_s) radius is the anatomic extend of the subfield that receives synaptic input. E_rev,inh is the reversal potential for inhibitory synaptic transmission, based on studies in which perforated patch pipettes were used. τ is the membrane time constant.
↵F1-a Nelson, 1977.
↵F1-b Cohen and Sterling, 1991.
↵F1-c via Horizontal cells.
↵F1-d GABA_C;Feigenspan et al., 1993; see Materials and Methods.
↵F1-e Identical to bipolar cell.
↵F1-f GABA_C;Roska et al., 1998.
↵F1-g GABA_A;Flores-Herr et al., 2001.
↵F1-h Glycine; Flores-Herr et al., 2001.
↵F1-i Cohen and Sterling, 1991; Freed and Sterling, 1988.
↵F1-j Linsenmeier et al., 1982.
↵F1-k GABA_A;Flores-Herr et al., 2001.